Plant sorbitol biosynthetic enzymes

ABSTRACT

This invention relates to an isolated nucleic acid fragment encoding a sorbitol biosynthetic enzyme. The invention also relates to the construction of a chimeric gene encoding all or a portion of the sorbitol biosynthetic enzyme, in sense or antisense orientation, wherein expression of the chimeric gene results in production of altered levels of the sorbitol biosynthetic enzyme in a transformed host cell.

This application claims the benefit of U.S. Provisional Application No. 60/092,952, filed Jul. 15, 1998.

FIELD OF THE INVENTION

This invention is in the field of plant molecular biology. More specifically, this invention pertains to nucleic acid fragments encoding sorbitol biosynthetic enzymes in plants and seeds.

BACKGROUND OF THE INVENTION

Sorbitol (D-glucitol) is an acyclic polyol found in a number of plant species (Kuo et al. (1990) Plant Physiol 93:1514-1520). Sorbitol is the primary photosynthetic product in rosaceous fruits and can account for a major portion of the carbon transported from the leaf. In corn sorbitol is found in seed and silk but not in pollen and leaf and low amounts of sorbitol are detectable in developing corn kernels. Sorbitol is found in soybeans and it is suggested that the accumulation of sorbitol may play a role in facilitating hexose metabolism in germinating seedlings (Kuo et al. (1990) Plant Physiol 93:1514-1520). During germination, soybeans convert oil and soluble oligosaccharides into sucrose which is in turn converted to glucose and fructose to fuel rapid growth. Some investigators have speculated that since plant fructokinases exhibit strong substrate inhibition by fructose, the presence of a sorbitol pathway may provide a mechanism to bypass this inhibition by converting excess fructose into sorbitol. This would help facilitate the metabolism of free glucose and fructose.

The metabolism of sorbitol has been extensively studied in several plant species (Kuo et al. (1990) Plant Physiol 93:1514-1520, Loescher (1987) Physiol. Plantarum 70:553-557, Loescher et al. in: Photoassimilate Distribution in Plants and Crops, ed. Zamski et al. Marcel Dekker, Inc., New York). There are several enzyme activities involved in sorbitol metabolism. Three of these enzymes are aldehyde reductase (NADPH-dependent aldose 6-phosphate reductase), sorbitol dehydrogenase, and NADP-dependent D-sorbitol-6-phosphate dehydrogenase. Aldehyde reductase appears responsible for the conversion of glucose to sorbitol; NADP-dependent D-sorbitol-6-phosphate dehydrogenase is also involved in sorbitol synthesis, and sorbitol dehydrogenase is involved in the conversion of sorbitol to fructose. Accordingly, the availability of nucleic acid sequences encoding all or a portion of these enzymes would facilitate studies to better understand carbohydrate metabolism and function in plants, provide genetic tools for the manipulation of the sorbitol biosynthetic pathway, and provide a means to control carbon partitioning in plant cells.

SUMMARY OF THE INVENTION

The instant invention relates to isolated nucleic acid fragments encoding sorbitol biosynthetic enzymes. Specifically, this invention concerns an isolated nucleic acid fragment encoding an aldehyde reductase, NADP-dependent D-sorbitol-6-phosphate dehydrogenase or sorbitol dehydrogenase and an isolated nucleic acid fragment that is substantially similar to an isolated nucleic acid fragment encoding a aldehyde reductase, NADP-dependent D-sorbitol-6-phosphate dehydrogenase or sorbitol dehydrogenase. In addition, this invention relates to a nucleic acid fragment that is complementary to the nucleic acid fragment encoding aldehyde reductase, NADP-dependent D-sorbitol-6-phosphate dehydrogenase or sorbitol dehydrogenase.

An additional embodiment of the instant invention pertains to a polypeptide encoding all or a substantial portion of a sorbitol biosynthetic enzyme selected from the group consisting of aldehyde reductase, NADP-dependent D-sorbitol-6-phosphate dehydrogenase or sorbitol dehydrogenase.

In another embodiment, the instant invention relates to a chimeric gene encoding an aldehyde reductase, NADP-dependent D-sorbitol-6-phosphate dehydrogenase or sorbitol dehydrogenase, or to a chimeric gene that comprises a nucleic acid fragment that is complementary to a nucleic acid fragment encoding an aldehyde reductase, NADP-dependent D-sorbitol-6-phosphate dehydrogenase or sorbitol dehydrogenase, operably linked to suitable regulatory sequences, wherein expression of the chimeric gene results in production of levels of the encoded protein in a transformed host cell that is altered (i.e., increased or decreased) from the level produced in an untransformed host cell.

In a further embodiment, the instant invention concerns a transformed host cell comprising in its genome a chimeric gene encoding an aldehyde reductase, NADP-dependent D-sorbitol-6-phosphate dehydrogenase or sorbitol dehydrogenase, operably linked to suitable regulatory sequences. Expression of the chimeric gene results in production of altered levels of the encoded protein in the transformed host cell. The transformed host cell can be of eukaryotic or prokaryotic origin, and include cells derived from higher plants and microorganisms. The invention also includes transformed plants that arise from transformed host cells of higher plants, and seeds derived from such transformed plants.

An additional embodiment of the instant invention concerns a method of altering the level of expression of an aldehyde reductase, NADP-dependent D-sorbitol-6-phosphate dehydrogenase or sorbitol dehydrogenase in a transformed host cell comprising: a) transforming a host cell with a chimeric gene comprising a nucleic acid fragment encoding an aldehyde reductase, NADP-dependent D-sorbitol-6-phosphate dehydrogenase or sorbitol dehydrogenase; and b) growing the transformed host cell under conditions that are suitable for expression of the chimeric gene wherein expression of the chimeric gene results in production of altered levels of aldehyde reductase, NADP-dependent D-sorbitol-6-phosphate dehydrogenase or sorbitol dehydrogenase in the transformed host cell.

An addition embodiment of the instant invention concerns a method for obtaining a nucleic acid fragment encoding all or a substantial portion of an amino acid sequence encoding an aldehyde reductase, NADP-dependent D-sorbitol-6-phosphate dehydrogenase or sorbitol dehydrogenase.

BRIEF DESCRIPTION OF THE SEQUENCE DESCRIPTIONS

The invention can be more fully understood from the following detailed description and the accompanying Sequence Listing which form a part of this application.

Table 1 lists the polypeptides that are described herein, the designation of the cDNA clones that comprise the nucleic acid fragments encoding polypeptides representing all or a substantial portion of these polypeptides, and the corresponding identifier (SEQ ID NO:) as used in the attached Sequence Listing. The sequence descriptions and Sequence Listing attached hereto comply with the rules governing nucleotide and/or amino acid sequence disclosures in patent applications as set forth in 37 C.F.R. §1.821-1.825.

TABLE 1 Sorbitol Biosynthetic Enzymes SEQ ID NO: (Amino Protein Clone Designation (Nucleotide) Acid) Aldehyde reductase Contig composed of: 1 2 ccase-b.pk0023.g2 ceb5.pk0015.g5 ceb5.pk0032.e9 ceb5.pk0044.c8 ceb5.pk0049.d10 ceb5.pk0052.a4 ceb5.pk0052.h8 ceb5.pk0062.a4 ceb5.pk0075.e7 ceb5.pk0075.g12 cen6.pk0001.g2 Aldehyde reductase rca1n.pk022.j17 3 4 Aldehyde reductase sr1.pk0003.c5 5 6 Aldehyde reductase wl1n.pk0078.e5 7 8 NADP-dependent p0002.cgevj66r 9 10 D-sorbitol-6-phosphate dehydrogenase NADP-dependent rls2.pk0004.b8 11 12 D-sorbitol-6-phosphate dehydrogenase NADP-dependent ses2w.pk0038.e12 13 14 D-sorbitol-6-phosphate dehydrogenase Sorbitol dehydrogenase p0113.cieae77r 15 16 Sorbitol dehydrogenase rlr6.pk0096.b8 17 18 Sorbitol dehydrogenase sgs6c.pk001.122 19 20 Sorbitol dehydrogenase wlm96.pk0016.h12 21 22

The Sequence Listing contains the one letter code for nucleotide sequence characters and the three letter codes for amino acids as defined in conformity with the IUPAC-IUBMB standards described in Nucleic Acids Research 13:3021-3030 (1985) and in the Biochemical Journal 219 (No. 2):345-373 (1984) which are herein incorporated by reference. The symbols and format used for nucleotide and amino acid sequence data comply with the rules set forth in 37 C.F.R. §1.822.

DETAILED DESCRIPTION OF THE INVENTION

In the context of this disclosure, a number of terms shall be utilized. As used herein, a “nucleic acid fragment” is a polymer of RNA or DNA that is single- or double-stranded, optionally containing synthetic, non-natural or altered nucleotide bases. A nucleic acid fragment in the form of a polymer of DNA may be comprised of one or more segments of cDNA, genomic DNA or synthetic DNA.

As used herein, “contig” refers to a nucleotide sequence that is assembled from two or more constituent nucleotide sequences that share common or overlapping regions of sequence homology. For example, the nucleotide sequences of two or more nucleic acid fragments can be compared and aligned in order to identify common or overlapping sequences. Where common or overlapping sequences exist between two or more nucleic acid fragments, the sequences (and thus their corresponding nucleic acid fragments) can be assembled into a single contiguous nucleotide sequence.

As used herein, “substantially similar” refers to nucleic acid fragments wherein changes in one or more nucleotide bases results in substitution of one or more amino acids, but do not affect the functional properties of the polypeptide encoded by the nucleotide sequence. “Substantially similar” also refers to nucleic acid fragments wherein changes in one or more nucleotide bases does not affect the ability of the nucleic acid fragment to mediate alteration of gene expression by gene silencing through for example antisense or co-suppression technology. “Substantially similar” also refers to modifications of the nucleic acid fragments of the instant invention such as deletion or insertion of one or more nucleotides that do not substantially affect the functional properties of the resulting transcript vis-à-vis the ability to mediate gene silencing or alteration of the functional properties of the resulting protein molecule. It is therefore understood that the invention encompasses more than the specific exemplary nucleotide or amino acid sequences and includes functional equivalents thereof.

For example, it is well known in the art that antisense suppression and co-suppression of gene expression may be accomplished using nucleic acid fragments representing less than the entire coding region of a gene, and by nucleic acid fragments that do not share 100% sequence identity with the gene to be suppressed. Moreover, alterations in a nucleic acid fragment which result in the production of a chemically equivalent amino acid at a given site, but do not effect the functional properties of the encoded polypeptide, are well known in the art. Thus, a codon for the amino acid alanine, a hydrophobic amino acid, may be substituted by a codon encoding another less hydrophobic residue, such as glycine, or a more hydrophobic residue, such as valine, leucine, or isoleucine. Similarly, changes which result in substitution of one negatively charged residue for another, such as aspartic acid for glutamic acid, or one positively charged residue for another, such as lysine for arginine, can also be expected to produce a functionally equivalent product. Nucleotide changes which result in alteration of the N-terminal and C-terminal portions of the polypeptide molecule would also not be expected to alter the activity of the polypeptide. Each of the proposed modifications is well within the routine skill in the art, as is determination of retention of biological activity of the encoded products.

Moreover, substantially similar nucleic acid fragments may also be characterized by their ability to hybridize. Estimates of such homology are provided by either DNA-DNA or DNA-RNA hybridization under conditions of stringency as is well understood by those skilled in the art (Hames and Higgins, Eds. (1985) Nucleic Acid Hybridisation, IRL Press, Oxford, U.K.). Stringency conditions can be adjusted to screen for moderately similar fragments, such as homologous sequences from distantly related organisms, to highly similar fragments, such as genes that duplicate functional enzymes from closely related organisms. Post-hybridization washes determine stringency conditions. One set of preferred conditions uses a series of washes starting with 6×SSC, 0.5% SDS at room temperature for 15 min, then repeated with 2×SSC, 0.5% SDS at 45° C. for 30 min, and then repeated twice with 0.2×SSC, 0.5% SDS at 50° C. for 30 min. A more preferred set of stringent conditions uses higher temperatures in which the washes are identical to those above except for the temperature of the final two 30 min washes in 0.2×SSC, 0.5% SDS was increased to 60° C. Another preferred set of highly stringent conditions uses two final washes in 0.1×SSC, 0.1% SDS at 65° C.

Substantially similar nucleic acid fragments of the instant invention may also be characterized by the percent identity of the amino acid sequences that they encode to the amino acid sequences disclosed herein, as determined by algorithms commonly employed by those skilled in this art. Preferred are those nucleic acid fragments whose nucleotide sequences encode amino acid sequences that are 80% identical to the amino acid sequences reported herein. More preferred nucleic acid fragments encode amino acid sequences that are 90% identical to the amino acid sequences reported herein. Most preferred are nucleic acid fragments that encode amino acid sequences that are 95% identical to the amino acid sequences reported herein. Sequence alignments and percent identity calculations were performed using the Megalign program of the LASARGENE bioinformatics computing suite (DNASTAR Inc., Madison, Wis.). Multiple alignment of the sequences was performed using the Clustal method of alignment (Higgins and Sharp (1989) CABIOS. 5:151-153) with the default parameters (GAP PENALTY=10, GAP LENGTH PENALTY=10). Default parameters for pairwise alignments using the Clustal method were KTUPLE 1, GAP PENALTY=3, WINDOW=5 and DIAGONALS SAVED=5.

A “substantial portion” of an amino acid or nucleotide sequence comprises an amino acid or a nucleotide sequence that is sufficient to afford putative identification of the protein or gene that the amino acid or nucleotide sequence comprises. Amino acid and nucleotide sequences can be evaluated either manually by one skilled in the art, or by using computer-based sequence comparison and identification tools that employ algorithms such as BLAST (Basic Local Alignment Search Tool; Altschul et al. (1993) J Mol. Biol. 215:403-410; see also www.ncbi.nlm.nih.gov/BLAST/). In general, a sequence of ten or more contiguous amino acids or thirty or more contiguous nucleotides is necessary in order to putatively identify a polypeptide or nucleic acid sequence as homologous to a known protein or gene. Moreover, with respect to nucleotide sequences, gene-specific oligonucleotide probes comprising 30 or more contiguous nucleotides may be used in sequence-dependent methods of gene identification (e.g., Southern hybridization) and isolation (e.g., in situ hybridization of bacterial colonies or bacteriophage plaques). In addition, short oligonucleotides of 12 or more nucleotides may be used as amplification primers in PCR in order to obtain a particular nucleic acid fragment comprising the primers. Accordingly, a “substantial portion” of a nucleotide sequence comprises a nucleotide sequence that will afford specific identification and/or isolation of a nucleic acid fragment comprising the sequence. The instant specification teaches amino acid and nucleotide sequences encoding polypeptides that comprise one or more particular plant proteins. The skilled artisan, having the benefit of the sequences as reported herein, may now use all or a substantial portion of the disclosed sequences for purposes known to those skilled in this art. Accordingly, the instant invention comprises the complete sequences as reported in the accompanying Sequence Listing, as well as substantial portions of those sequences as defined above.

“Codon degeneracy” refers to divergence in the genetic code permitting variation of the nucleotide sequence without effecting the amino acid sequence of an encoded polypeptide. Accordingly, the instant invention relates to any nucleic acid fragment comprising a nucleotide sequence that encodes all or a substantial portion of the amino acid sequences set forth herein. The skilled artisan is well aware of the “codon-bias” exhibited by a specific host cell in usage of nucleotide codons to specify a given amino acid. Therefore, when synthesizing a nucleic acid fragment for improved expression in a host cell, it is desirable to design the nucleic acid fragment such that its frequency of codon usage approaches the frequency of preferred codon usage of the host cell.

“Synthetic nucleic acid fragments” can be assembled from oligonucleotide building blocks that are chemically synthesized using procedures known to those skilled in the art. These building blocks are ligated and annealed to form larger nucleic acid fragments which may then be enzymatically assembled to construct the entire desired nucleic acid fragment. “Chemically synthesized”, as related to nucleic acid fragment, means that the component nucleotides were assembled in vitro. Manual chemical synthesis of nucleic acid fragments may be accomplished using well established procedures, or automated chemical synthesis can be performed using one of a number of commercially available machines. Accordingly, the nucleic acid fragments can be tailored for optimal gene expression based on optimization of nucleotide sequence to reflect the codon bias of the host cell. The skilled artisan appreciates the likelihood of successful gene expression if codon usage is biased towards those codons favored by the host. Determination of preferred codons can be based on a survey of genes derived from the host cell where sequence information is available.

“Gene” refers to a nucleic acid fragment that expresses a specific protein, including regulatory sequences preceding (5′ non-coding sequences) and following (3′ non-coding sequences) the coding sequence. “Native gene” refers to a gene as found in nature with its own regulatory sequences. “Chimeric gene” refers any gene that is not a native gene, comprising regulatory and coding sequences that are not found together in nature. Accordingly, a chimeric gene may comprise regulatory sequences and coding sequences that are derived from different sources, or regulatory sequences and coding sequences derived from the same source, but arranged in a manner different than that found in nature. “Endogenous gene” refers to a native gene in its natural location in the genome of an organism. A “foreign” gene refers to a gene not normally found in the host organism, but that is introduced into the host organism by gene transfer. Foreign genes can comprise native genes inserted into a non-native organism, or chimeric genes. A “transgene” is a gene that has been introduced into the genome by a transformation procedure.

“Coding sequence” refers to a nucleotide sequence that codes for a specific amino acid sequence. “Regulatory sequences” refer to nucleotide sequences located upstream (5′ non-coding sequences), within, or downstream (3′ non-coding sequences) of a coding sequence, and which influence the transcription, RNA processing or stability, or translation of the associated coding sequence. Regulatory sequences may include promoters, translation leader sequences, introns, and polyadenylation recognition sequences.

“Promoter” refers to a nucleotide sequence capable of controlling the expression of a coding sequence or functional RNA. In general, a coding sequence is located 3′ to a promoter sequence. The promoter sequence consists of proximal and more distal upstream elements, the latter elements often referred to as enhancers. Accordingly, an “enhancer” is a nucleotide sequence which can stimulate promoter activity and may be an innate element of the promoter or a heterologous element inserted to enhance the level or tissue-specificity of a promoter. Promoters may be derived in their entirety from a native gene, or be composed of different elements derived from different promoters found in nature, or even comprise synthetic nucleotide segments. It is understood by those skilled in the art that different promoters may direct the expression of a gene in different tissues or cell types, or at different stages of development, or in response to different environmental conditions. Promoters which cause a nucleic acid fragment to be expressed in most cell types at most times are commonly referred to as “constitutive promoters”. New promoters of various types useful in plant cells are constantly being discovered; numerous examples may be found in the compilation by Okamuro and Goldberg (1989) Biochemistry ofPlants 15:1-82. It is further recognized that since in most cases the exact boundaries of regulatory sequences have not been completely defined, nucleic acid fragments of different lengths may have identical promoter activity.

The “translation leader sequence” refers to a nucleotide sequence located between the promoter sequence of a gene and the coding sequence. The translation leader sequence is present in the fully processed mRNA upstream of the translation start sequence. The translation leader sequence may affect processing of the primary transcript to mRNA, mRNA stability or translation efficiency. Examples of translation leader sequences have been described (Turner and Foster (1995) Molecular Biotechnology 3:225).

The “3′ non-coding sequences” refer to nucleotide sequences located downstream of a coding sequence and include polyadenylation recognition sequences and other sequences encoding regulatory signals capable of affecting mRNA processing or gene expression. The polyadenylation signal is usually characterized by affecting the addition of polyadenylic acid tracts to the 3′ end of the mRNA precursor. The use of different 3′ non-coding sequences is exemplified by Ingelbrecht et al. (1989) Plant Cell 1:671-680.

“RNA transcript” refers to the product resulting from RNA polymerase-catalyzed transcription of a DNA sequence. When the RNA transcript is a perfect complementary copy of the DNA sequence, it is referred to as the primary transcript or it may be a RNA sequence derived from posttranscriptional processing of the primary transcript and is referred to as the mature RNA. “Messenger RNA (mRNA)” refers to the RNA that is without introns and that can be translated into polypeptide by the cell. “cDNA” refers to a double-stranded DNA that is complementary to and derived from mRNA. “Sense” RNA refers to an RNA transcript that includes the mRNA and so can be translated into a polypeptide by the cell. “Antisense RNA” refers to an RNA transcript that is complementary to all or part of a target primary transcript or mRNA and that blocks the expression of a target gene (see U.S. Pat. No. 5,107,065, incorporated herein by reference). The complementarity of an antisense RNA may be with any part of the specific nucleotide sequence, i.e., at the 5′ non-coding sequence, 3′ non-coding sequence, introns, or the coding sequence. “Functional RNA” refers to sense RNA, antisense RNA, ribozyme RNA, or other RNA that may not be translated but yet has an effect on cellular processes.

The term “operably linked” refers to the association of two or more nucleic acid fragments on a single nucleic acid fragment so that the function of one is affected by the other. For example, a promoter is operably linked with a coding sequence when it is capable of affecting the expression of that coding sequence (i.e., that the coding sequence is under the transcriptional control of the promoter). Coding sequences can be operably linked to regulatory sequences in sense or antisense orientation.

The term “expression”, as used herein, refers to the transcription and stable accumulation of sense (mRNA) or antisense RNA derived from the nucleic acid fragment of the invention. Expression may also refer to translation of mRNA into a polypeptide. “Antisense inhibition” refers to the production of antisense RNA transcripts capable of suppressing the expression of the target protein. “Overexpression” refers to the production of a gene product in transgenic organisms that exceeds levels of production in normal or non-transformed organisms. “Co-suppression” refers to the production of sense RNA transcripts capable of suppressing the expression of identical or substantially similar foreign or endogenous genes (U.S. Pat. No. 5,231,020, incorporated herein by reference).

“Altered levels” refers to the production of gene product(s) in transgenic organisms in amounts or proportions that differ from that of normal or non-transformed organisms.

“Mature” protein refers to a post-translationally processed polypeptide; i.e., one from which any pre- or propeptides present in the primary translation product have been removed. “Precursor” protein refers to the primary product of translation of mRNA; i.e., with pre- and propeptides still present. Pre- and propeptides may be but are not limited to intracellular localization signals.

A “chloroplast transit peptide” is an amino acid sequence which is translated in conjunction with a protein and directs the protein to the chloroplast or other plastid types present in the cell in which the protein is made. “Chloroplast transit sequence” refers to a nucleotide sequence that encodes a chloroplast transit peptide. A “signal peptide” is an amino acid sequence which is translated in conjunction with a protein and directs the protein to the secretory system (Chrispeels (1991) Ann. Rev. Plant Phys. Plant Mol. Biol. 42:21-53). If the protein is to be directed to a vacuole, a vacuolar targeting signal (supra) can further be added, or if to the endoplasmic reticulum, an endoplasmic reticulum retention signal (supra) may be added. If the protein is to be directed to the nucleus, any signal peptide present should be removed and instead a nuclear localization signal included (Raikhel (1992) Plant Phys. 100:1627-1632).

“Transformation” refers to the transfer of a nucleic acid fragment into the genome of a host organism, resulting in genetically stable inheritance. Host organisms containing the transformed nucleic acid fragments are referred to as “transgenic” organisms. Examples of methods of plant transformation include Agrobacterium-mediated transformation (De Blaere et al. (1987) Meth. Enzymol. 143:277) and particle-accelerated or “gene gun” transformation technology (Klein et al. (1987) Nature (London) 327:70-73; U.S. Pat. No. 4,945,050, incorporated herein by reference).

Standard recombinant DNA and molecular cloning techniques used herein are well known in the art and are described more fully in Sambrook et al. Molecular Cloning: A Laboratory Manual; Cold Spring Harbor Laboratory Press: Cold Spring Harbor, 1989 (hereinafter “Maniatis”).

Nucleic acid fragments encoding at least a portion of several sorbitol biosynthetic enzymes have been isolated and identified by comparison of random plant cDNA sequences to public databases containing nucleotide and protein sequences using the BLAST algorithms well known to those skilled in the art. The nucleic acid fragments of the instant invention may be used to isolate cDNAs and genes encoding homologous proteins from the same or other plant species. Isolation of homologous genes using sequence-dependent protocols is well known in the art. Examples of sequence-dependent protocols include, but are not limited to, methods of nucleic acid hybridization, and methods of DNA and RNA amplification as exemplified by various uses of nucleic acid amplification technologies (e.g., polymerase chain reaction, ligase chain reaction).

For example, genes encoding other aldehyde reductase, NADP-dependent D-sorbitol-6-phosphate dehydrogenase or sorbitol dehydrogenase, either as cDNAs or genomic DNAs, could be isolated directly by using all or a portion of the instant nucleic acid fragments as DNA hybridization probes to screen libraries from any desired plant employing methodology well known to those skilled in the art. Specific oligonucleotide probes based upon the instant nucleic acid sequences can be designed and synthesized by methods known in the art (Maniatis). Moreover, the entire sequences can be used directly to synthesize DNA probes by methods known to the skilled artisan such as random primer DNA labeling, nick translation, or end-labeling techniques, or RNA probes using available in vitro transcription systems. In addition, specific primers can be designed and used to amplify a part or all of the instant sequences. The resulting amplification products can be labeled directly during amplification reactions or labeled after amplification reactions, and used as probes to isolate full length cDNA or genomic fragments under conditions of appropriate stringency.

In addition, two short segments of the instant nucleic acid fragments may be used in polymerase chain reaction protocols to amplify longer nucleic acid fragments encoding homologous genes from DNA or RNA. The polymerase chain reaction may also be performed on a library of cloned nucleic acid fragments wherein the sequence of one primer is derived from the instant nucleic acid fragments, and the sequence of the other primer takes advantage of the presence of the polyadenylic acid tracts to the 3′ end of the MRNA precursor encoding plant genes. Alternatively, the second primer sequence may be based upon sequences derived from the cloning vector. For example, the skilled artisan can follow the RACE protocol (Frohman et al. (1988) Proc. Natl. Acad Sci. USA 85:8998) to generate cDNAs by using PCR to amplify copies of the region between a single point in the transcript and the 3′ or 5′ end. Primers oriented in the 3′ and 5′ directions can be designed from the instant sequences. Using commercially available 3′ RACE or 5′ RACE systems (BRL), specific 3′ or 5′ cDNA fragments can be isolated (Ohara et al. (1989) Proc. Natl. Acad Sci. USA 86:5673; Loh et al. (1989) Science 243:217). Products generated by the 3′ and 5′ RACE procedures can be combined to generate full-length cDNAs (Frohman and Martin (1989) Techniques 1:165).

Availability of the instant nucleotide and deduced amino acid sequences facilitates immunological screening of cDNA expression libraries. Synthetic peptides representing portions of the instant amino acid sequences may be synthesized. These peptides can be used to immunize animals to produce polyclonal or monoclonal antibodies with specificity for peptides or proteins comprising the amino acid sequences. These antibodies can be then be used to screen cDNA expression libraries to isolate full-length cDNA clones of interest (Lerner (1984) Adv. Immunol. 36:1; Maniatis).

The nucleic acid fragments of the instant invention may be used to create transgenic plants in which the disclosed polypeptides are present at higher or lower levels than normal or in cell types or developmental stages in which they are not normally found. This would have the effect of altering the level of sobitol biosynthesis in those cells.

Overexpression of the proteins of the instant invention may be accomplished by first constructing a chimeric gene in which the coding region is operably linked to a promoter capable of directing expression of a gene in the desired tissues at the desired stage of development. For reasons of convenience, the chimeric gene may comprise promoter sequences and translation leader sequences derived from the same genes. 3′ Non-coding sequences encoding transcription termination signals may also be provided. The instant chimeric gene may also comprise one or more introns in order to facilitate gene expression.

Plasmid vectors comprising the instant chimeric gene can then constructed. The choice of plasmid vector is dependent upon the method that will be used to transform host plants. The skilled artisan is well aware of the genetic elements that must be present on the plasmid vector in order to successfully transform, select and propagate host cells containing the chimeric gene. The skilled artisan will also recognize that different independent transformation events will result in different levels and patterns of expression (Jones et al. (1985) EMBO J. 4:2411-2418; De Almeida et al. (1989) Mol. Gen. Genetics 218:78-86), and thus that multiple events must be screened in order to obtain lines displaying the desired expression level and pattern. Such screening may be accomplished by Southern analysis of DNA, Northern analysis of mRNA expression, Western analysis of protein expression, or phenotypic analysis.

For some applications it may be useful to direct the instant polypeptides to different cellular compartments, or to facilitate its secretion from the cell. It is thus envisioned that the chimeric gene described above may be further supplemented by altering the coding sequence to encode the instant polypeptides with appropriate intracellular targeting sequences such as transit sequences (Keegstra (1989) Cell 56:247-253), signal sequences or sequences encoding endoplasmic reticulum localization (Chrispeels (1991) Ann. Rev. Plant Phys. Plant Mol. Biol. 42:21-53), or nuclear localization signals (Raikhel (1992) Plant Phys.100:1627-1632) added and/or with targeting sequences that are already present removed. While the references cited give examples of each of these, the list is not exhaustive and more targeting signals of utility may be discovered in the future.

It may also be desirable to reduce or eliminate expression of genes encoding the instant polypeptides in plants for some applications. In order to accomplish this, a chimeric gene designed for co-suppression of the instant polypeptide can be constructed by linking a gene or gene fragment encoding that polypeptide to plant promoter sequences. Alternatively, a chimeric gene designed to express antisense RNA for all or part of the instant nucleic acid fragment can be constructed by linking the gene or gene fragment in reverse orientation to plant promoter sequences. Either the co-suppression or antisense chimeric genes could be introduced into plants via transformation wherein expression of the corresponding endogenous genes are reduced or eliminated.

Molecular genetic solutions to the generation of plants with altered gene expression have a decided advantage over more traditional plant breeding approaches. Changes in plant phenotypes can be produced by specifically inhibiting expression of one or more genes by antisense inhibition or cosuppression (U.S. Pat. Nos. 5,190,931, 5,107,065 and 5,283,323). An antisense or cosuppression construct would act as a dominant negative regulator of gene activity. While conventional mutations can yield negative regulation of gene activity these effects are most likely recessive. The dominant negative regulation available with a transgenic approach may be advantageous from a breeding perspective. In addition, the ability to restrict the expression of specific phenotype to the reproductive tissues of the plant by the use of tissue specific promoters may confer agronomic advantages relative to conventional mutations which may have an effect in all tissues in which a mutant gene is ordinarily expressed.

The person skilled in the art will know that special considerations are associated with the use of antisense or cosuppresion technologies in order to reduce expression of particular genes. For example, the proper level of expression of sense or antisense genes may require the use of different chimeric genes utilizing different regulatory elements known to the skilled artisan. Once transgenic plants are obtained by one of the methods described above, it will be necessary to screen individual transgenics for those that most effectively display the desired phenotype. Accordingly, the skilled artisan will develop methods for screening large numbers of transformants. The nature of these screens will generally be chosen on practical grounds, and is not an inherent part of the invention. For example, one can screen by looking for changes in gene expression by using antibodies specific for the protein encoded by the gene being suppressed, or one could establish assays that specifically measure enzyme activity. A preferred method will be one which allows large numbers of samples to be processed rapidly, since it will be expected that a large number of transformants will be negative for the desired phenotype.

The instant polypeptides (or portions thereof) may be produced in heterologous host cells, particularly in the cells of microbial hosts, and can be used to prepare antibodies to the these proteins by methods well known to those skilled in the art. The antibodies are useful for detecting the polypeptides of the instant invention in situ in cells or in vitro in cell extracts. Preferred heterologous host cells for production of the instant polypeptides are microbial hosts. Microbial expression systems and expression vectors containing regulatory sequences that direct high level expression of foreign proteins are well known to those skilled in the art. Any of these could be used to construct a chimeric gene for production of the instant polypeptides. This chimeric gene could then be introduced into appropriate microorganisms via transformation to provide high level expression of the encoded sorbitol biosynthetic enzyme. An example of a vector for high level expression of the instant polypeptides in a bacterial host is provided (Example 8).

All or a substantial portion of the nucleic acid fragments of the instant invention may also be used as probes for genetically and physically mapping the genes that they are a part of, and as markers for traits linked to those genes. Such information may be useful in plant breeding in order to develop lines with desired phenotypes. For example, the instant nucleic acid fragments may be used as restriction fragment length polymorphism (RFLP) markers. Southern blots (Maniatis) of restriction-digested plant genomic DNA may be probed with the nucleic acid fragments of the instant invention. The resulting banding patterns may then be subjected to genetic analyses using computer programs such as MapMaker (Lander et al. (1987) Genomics 1:174-181) in order to construct a genetic map. In addition, the nucleic acid fragments of the instant invention may be used to probe Southern blots containing restriction endonuclease-treated genomic DNAs of a set of individuals representing parent and progeny of a defined genetic cross. Segregation of the DNA polymorphisms is noted and used to calculate the position of the instant nucleic acid sequence in the genetic map previously obtained using this population (Botstein et al. (1980) Am. J. Hum. Genet. 32:314-331).

The production and use of plant gene-derived probes for use in genetic mapping is described in Bernatzky and Tanksley (1986) Plant Mol. Biol. Reporter 4(1):37-41. Numerous publications describe genetic mapping of specific cDNA clones using the methodology outlined above or variations thereof. For example, F2 intercross populations, backcross populations, randomly mated populations, near isogenic lines, and other sets of individuals may be used for mapping. Such methodologies are well known to those skilled in the art.

Nucleic acid probes derived from the instant nucleic acid sequences may also be used for physical mapping (i.e., placement of sequences on physical maps; see Hoheisel et al. In: Nonmammalian Genomic Analysis: A Practical Guide, Academic press 1996, pp. 319-346, and references cited therein).

In another embodiment, nucleic acid probes derived from the instant nucleic acid sequences may be used in direct fluorescence in situ hybridization (FISH) mapping (Trask (1991) Trends Genet. 7:149-154). Although current methods of FISH mapping favor use of large clones (several to several hundred KB; see Laan et al. (1995) Genome Research 5:13-20), improvements in sensitivity may allow performance of FISH mapping using shorter probes.

A variety of nucleic acid amplification-based methods of genetic and physical mapping may be carried out using the instant nucleic acid sequences. Examples include allele-specific amplification (Kazazian (1989) J. Lab. Clin. Med. 114(2):95-96), polymorphism of PCR-amplified fragments (CAPS; Sheffield et al. (1993) Genomics 16:325-332), allele-specific ligation (Landegren et al. (1988) Science 241:1077-1080), nucleotide extension reactions (Sokolov (1990) Nucleic Acid Res. 18:3671), Radiation Hybrid Mapping (Walter et al. (1997) Nature Genetics 7:22-28) and Happy Mapping (Dear and Cook (1989) Nucleic Acid Res. 17:6795-6807). For these methods, the sequence of a nucleic acid fragment is used to design and produce primer pairs for use in the amplification reaction or in primer extension reactions. The design of such primers is well known to those skilled in the art. In methods employing PCR-based genetic mapping, it may be necessary to identify DNA sequence differences between the parents of the mapping cross in the region corresponding to the instant nucleic acid sequence. This, however, is generally not necessary for mapping methods.

Loss of function mutant phenotypes may be identified for the instant cDNA clones either by targeted gene disruption protocols or by identifying specific mutants for these genes contained in a maize population carrying mutations in all possible genes (Ballinger and Benzer (1989) Proc. Natl. Acad. Sci USA 86:9402; Koes et al. (1995) Proc. Natl. Acad. Sci USA 92:8149; Bensen et al. (1995) Plant Cell 7:75). The latter approach may be accomplished in two ways. First, short segments of the instant nucleic acid fragments may be used in polymerase chain reaction protocols in conjunction with a mutation tag sequence primer on DNAs prepared from a population of plants in which Mutator transposons or some other mutation-causing DNA element has been introduced (see Bensen, supra). The amplification of a specific DNA fragment with these primers indicates the insertion of the mutation tag element in or near the plant gene encoding the instant polypeptides. Alternatively, the instant nucleic acid fragment may be used as a hybridization probe against PCR amplification products generated from the mutation population using the mutation tag sequence primer in conjunction with an arbitrary genomic site primer, such as that for a restriction enzyme site-anchored synthetic adaptor. With either method, a plant containing a mutation in the endogenous gene encoding the instant polypeptides can be identified and obtained. This mutant plant can then be used to determine or confirm the natural function of the instant polypeptides disclosed herein.

EXAMPLES

The present invention is further defined in the following Examples, in which all parts and percentages are by weight and degrees are Celsius, unless otherwise stated. It should be understood that these Examples, while indicating preferred embodiments of the invention, are given by way of illustration only. From the above discussion and these Examples, one skilled in the art can ascertain the essential characteristics of this invention, and without departing from the spirit and scope thereof, can make various changes and modifications of the invention to adapt it to various usages and conditions.

Example 1 Composition of cDNA Libraries; Isolation and Sequencing of cDNA Clones

cDNA libraries representing mRNAs from various corn, rice, soybean and wheat tissues were prepared. The characteristics of the libraries are described below.

TABLE 2 cDNA Libraries from Corn, Rice, Soybean and Wheat Library Tissue Clone ccase-b Corn (Zea mays L.) type II callus tissue, ccase-b.pk0023.g2 somatic embryo formed ceb5 Corn (Zea mays L.) amplified embryo ceb5.pk0015.g5 30 day ceb5.pk0032.e9 ceb5.pk0044.c8 ceb5.pk0049.d10 ceb5.pk0052.a4 ceb5.pk0052.h8 ceb5.pk0062.a4 ceb5.pk0075.e7 ceb5.pk0075.g12 cen6.pk0001.g2 p0002 Corn (Zea mays L.) tassel: premeiotic p0002.cgevj66r (> early uninucleate) p0113 Corn (Zea mays L.) intercalary meristem p0113.cieae77r of expanding internodes 5-9*; Sampled @ V10stage** rca1n Rice (Oryza sativa L.) callus* rca1n.pk022.j17 rlr6 Rice (Oryza sativa L.) leaf (15 days after rlr6.pk0096.b8 germination) 6 hrs after infection of Magaporthe grisea strain 4360-R-62 (AVR2-YAMO); Resistant rls2 Rice (Oryza sativa L.) leaf (15 DAG) rls2.pk0004.b8 2 hrs after infection of Magaporthe grisea strain 4360-R-67 (avr2-yamo); Susceptible ses2w Soybean (Glycine max L.) embryogenic ses2w.pk0038.e12 suspension 2 weeks after subculture sgs6c Soybean (Glycine max L.) seeds 8 days sgs6c.pk001.122 after germination. sr1 Soybean (Glycine max L.) root library sr1.pk0003.c5 wl1n Wheat (Triticum aestivum L.) leaf 7 day wl1n.pk0078.e5 old seedling, light grown* wlm96 Wheat (Triticum aestivum L.) seedlings wlm96.pk0016.h12 96 hr after inoculation w/E. graminis *These libraries were normalized essentially as described in U.S. Pat. No. 5,482,845, incorporated herein by reference.

cDNA libraries may be prepared by any one of many methods available. For example, the cDNAs may be introduced into plasmid vectors by first preparing the cDNA libraries in Uni-ZAP™ XR vectors according to the manufacturer's protocol (Stratagene Cloning Systems, La Jolla, Calif. The Uni-ZAP™ XR libraries are converted into plasmid libraries according to the protocol provided by Stratagene. Upon conversion, cDNA inserts will be contained in the plasmid vector pBluescript. In addition, the cDNAs may be introduced directly into precut Bluescript II SK(+) vectors (Stratagene) using T4 DNA ligase (New England Biolabs), followed by transfection into DH10B cells according to the manufacturer's protocol (GIBCO BRL Products). Once the cDNA inserts are in plasmid vectors, plasmid DNAs are prepared from randomly picked bacterial colonies containing recombinant pBluescript plasmids, or the insert cDNA sequences are amplified via polymerase chain reaction using primers specific for vector sequences flanking the inserted cDNA sequences. Amplified insert DNAs or plasmid DNAs are sequenced in dye-primer sequencing reactions to generate partial cDNA sequences (expressed sequence tags or “ESTs”; see Adams et al., (1991) Science 252:1651). The resulting ESTs are analyzed using a Perkin Elmer Model 377 fluorescent sequencer.

Example 2 Identification of cDNA Clones

cDNA clones encoding sorbitol biosynthetic enzymes were identified by conducting BLAST (Basic Local Alignment Search Tool; Altschul et al. (1993) J. Mol. Biol. 215:403-410; see also www.ncbi.nlm.nih.gov/BLAST/) searches for similarity to sequences contained in the BLAST “nr” database (comprising all non-redundant GenBank CDS translations, sequences derived from the 3-dimensional structure Brookhaven Protein Data Bank, the last major release of the SWISS-PROT protein sequence database, EMBL, and DDBJ databases). The cDNA sequences obtained in Example 1 were analyzed for similarity to all publicly available DNA sequences contained in the “nr” database using the BLASTN algorithm provided by the National Center for Biotechnology Information (NCBI). The DNA sequences were translated in all reading frames and compared for similarity to all publicly available protein sequences contained in the “nr” database using the BLASTX algorithm (Gish and States (1993) Nature Genetics 3:266-272) provided by the NCBI. For convenience, the P-value (probability) of observing a match of a cDNA sequence to a sequence contained in the searched databases merely by chance as calculated by BLAST are reported herein as “pLog” values, which represent the negative of the logarithm of the reported P-value. Accordingly, the greater the pLog value, the greater the likelihood that the cDNA sequence and the BLAST “hit” represent homologous proteins.

Example 3 Characterization of cDNA Clones Encoding Aldehyde Reductase

The BLASTX search using the EST sequences from clones listed in Table 3 revealed similarity of the polypeptides encoded by the cDNAs to aldehyde reductase from Hordeum vulgare (NCBI Identifier No. gi 113595), Avena fatua (NCBI Identifier No. gi 2130022) and Medicago sativa (NCBI Identifier No. gi 3378650). Shown in Table 3 are the BLAST results for individual ESTs (“EST”), the sequences of the entire cDNA inserts comprising the indicated CDNA clones (“FIS”), or contigs assembled from two or more ESTs (“Contig”):

TABLE 3 BLAST Results for Sequences Encoding Polypeptides Homologous to Hordeum vulgare, Avena fatua and Medicago sativa Aldehyde Reductase Clone Status BLAST pLog Score Contig composed of: Contig 171.00 (gi 113595) ccase-b.pk0023.g2 ceb5.pk0015.g5 ceb5.pk0032.e9 ceb5.pk0044.c8 ceb5.pk0049.d10 ceb5.pk0052.a4 ceb5.pk0052.h8 ceb5.pk0062.a4 ceb5.pk0075.e7 ceb5.pk0075.g12 cen6.pk0001.g2 rca1n.pk022.j17 FIS 172.00 (gi 2130022) sr1.pk0003.c5 FIS 157.00 (gi 3378650) wl1n.pk0078.e5 EST 112.00 (gi 3378650)

The data in Table 4 represents a calculation of the percent identity of the amino acid sequences set forth in SEQ ID NOs:2, 4, 6 and 8 and the Hordeum vulgare, Avena fatua and Medicago sativa sequences (SEQ ID NOs:23, 24 and 25).

TABLE 4 Percent Identity of Amino Acid Sequences Deduced From the Nucleotide Sequences of DNA Clones Encoding Polypeptides Homologous to Hordeum vulgare, Avena fatua and Medicago sativa Aldehyde Reductase SEQ ID NO. Percent Identity to 2 87% (gi 113595) 4 90% (gi 2130022) 6 84% (gi 3378650) 8 61% (gi 3378650)

Sequence alignments and percent identity calculations were performed using the Megalign program of the LASARGENE bioinformatics computing suite (DNASTAR Inc., Madison, Wis.). Multiple alignment of the sequences was performed using the Clustal method of alignment (Higgins and Sharp (1989) CABIOS. 5:151-153) with the default parameters (GAP PENALTY=10, GAP LENGTH PENALTY=10). Default parameters for pairwise alignments using the Clustal method were KTUPLE 1, GAP PENALTY=3, WINDOW=5 and DIAGONALS SAVED=5. Sequence alignments and BLAST scores and probabilities indicate that the nucleic acid fragments comprising the instant cDNA clones encode a substantial portion of an aldehyde reductase. These sequences represent the first corn, rice, soybean and wheat sequences encoding aldehyde reductase.

Example 4 Characterization of cDNA Clones Encoding NADPH-Dependent Mannose 6-Phosphate Dehydrogense

The BLASTX search using the EST sequences from clones listed in Table 5 revealed similarity of the polypeptides encoded by the cDNAs to NADPH-dependent mannose 6-phosphate dehydrogense from Apium graveolens (NCBI Identifier No. gi 1835701). Shown in Table 5 are the BLAST results for individual ESTs (“EST”), the sequences of the entire cDNA inserts comprising the indicated cDNA clones (“FIS”), or contigs assembled from two or more ESTs (“Contig”):

TABLE 5 BLAST Results for Sequences Encoding Polypeptides Homologous to Apium graveolens NADPH-Dependent Mannose 6-Phosphate Dehydrogense Clone Status BLAST pLog Score to (gi 1835701) p0002.cgevj66r EST 134.00 rls2.pk0004.b8 FIS 138.00 ses2w.pk0038.e12 EST 138.00

The data in Table 6 represents a calculation of the percent identity of the amino acid sequences set forth in SEQ ID NOs: 10, 12 and 14 and the Apium graveolens sequences (SEQ ID NO:26).

TABLE 6 Percent Identity of Amino Acid Sequences Deduced From the Nucleotide Sequences of DNA Clones Encoding Polypeptides Homologous to Apium graveolens NADPH-Dependent Mannose 6-Phosphate Dehydrogense SEQ ID NO. Percent Identity to (gi 1835701) 10 70% 12 71% 14 74%

Sequence alignments and percent identity calculations were performed using the Megalign program of the LASARGENE bioinformatics computing suite (DNASTAR Inc., Madison, Wis.). Multiple alignment of the sequences was performed using the Clustal method of alignment (Higgins and Sharp (1989) CABIOS. 5:151-153) with the default parameters (GAP PENALTY=10, GAP LENGTH PENALTY=10). Default parameters for pairwise alignments using the Clustal method were KTUPLE 1, GAP PENALTY=3, WINDOW=5 and DIAGONALS SAVED=5. Sequence alignments and BLAST scores and probabilities indicate that the nucleic acid fragments comprising the instant cDNA clones encode a substantial portion of a NADPH-dependent mannose 6-phosphate dehydrogense. These sequences represent the first corn, rice and soybean sequences encoding NADPH-dependent mannose 6-phosphate dehydrogense.

Example 5 Characterization of cDNA Clones Encoding Sorbitol Dehydrogenase

The BLASTX search using the EST sequences from clones listed in Table 7 revealed similarity of the polypeptides encoded by the cDNAs to sorbitol dehydrogenase from Malus domestica (NCBI Identifier No. gi 4519539). Shown in Table 7 are the BLAST results for individual ESTs (“EST”), the sequences of the entire cDNA inserts comprising the indicated cDNA clones (“FIS”), or contigs assembled from two or more ESTs (“Contig”):

TABLE 7 BLAST Results for Sequences Encoding Polypeptides Homologous to Malus domestica Sorbitol Dehydrogenase Clone Status BLAST pLog Score to (gi 4519539) p0113.cieae77r EST 158.00 rlr6.pk0096.b8 EST  35.70 sgs6c.pk001.122 FIS 133.00 wlm96.pk0016.h12 FIS 129.00

The data in Table 8 represents a calculation of the percent identity of the amino acid sequences set forth in SEQ ID NOs:16, 18, 20 and 22 and the Malus domestica sequence (SEQ ID NO:27).

TABLE 8 Percent Identity of Amino Acid Sequences Deduced From the Nucleotide Sequences of DNA Clones Encoding Polypeptides Homologous to Malus domestica Sorbitol Dehydrogenase SEQ ID NO. Percent Identity to (gi 4519539) p0113.cieae77r 71% rlr6.pk0096.b8 45% sgs6c.pk001.122 69% wlm96.pk0016.h12 72%

Sequence alignments and percent identity calculations were performed using the Megalign program of the LASARGENE bioinformatics computing suite (DNASTAR Inc., Madison, Wis.). Multiple alignment of the sequences was performed using the Clustal method of alignment (Higgins and Sharp (1989) CABIOS. 5:151-153) with the default parameters (GAP PENALTY=10, GAP LENGTH PENALTY=10). Default parameters for pairwise alignments using the Clustal method were KTUPLE 1, GAP PENALTY=3, WINDOW=5 and DIAGONALS SAVED=5. Sequence alignments and BLAST scores and probabilities indicate that the nucleic acid fragments comprising the instant cDNA clones encode a substantial portion of a sorbitol dehydrogenase. These sequences represent the first corn, rice, soybean and wheat sequences encoding sorbitol dehydrogenase.

Example 6 Expression of Chimeric Genes in Monocot Cells

A chimeric gene comprising a cDNA encoding the instant polypeptides in sense orientation with respect to the maize 27 kD zein promoter that is located 5′ to the cDNA fragment, and the 10 kD zein 3′ end that is located 3′ to the cDNA fragment, can be constructed. The cDNA fragment of this gene may be generated by polymerase chain reaction (PCR) of the cDNA clone using appropriate oligonucleotide primers. Cloning sites (NcoI or SmaI) can be incorporated into the oligonucleotides to provide proper orientation of the DNA fragment when inserted into the digested vector pML 103 as described below. Amplification is then performed in a standard PCR. The amplified DNA is then digested with restriction enzymes NcoI and SmaI and fractionated on an agarose gel. The appropriate band can be isolated from the gel and combined with a 4.9 kb NcoI-SmaI fragment of the plasmid pML103. Plasmid pML103 has been deposited under the terms of the Budapest Treaty at ATCC (American Type Culture Collection, 10801 University Blvd., Manassas, Va. 20110-2209), and bears accession number ATCC 97366. The DNA segment from pML103 contains a 1.05 kb SalI-NcoI promoter fragment of the maize 27 kD zein gene and a 0.96 kb SmaI-SalI fragment from the 3′ end of the maize 10 kD zein gene in the vector pGem9Zf(+) (Promega). Vector and insert DNA can be ligated at 15° C. overnight, essentially as described (Maniatis). The ligated DNA may then be used to transform E. coli XL1-Blue (Epicurian Coli XL-1 Blue™; Stratagene). Bacterial transformants can be screened by restriction enzyme digestion of plasmid DNA and limited nucleotide sequence analysis using the dideoxy chain termination method (Sequenase™ DNA Sequencing Kit; U.S. Biochemical). The resulting plasmid construct would comprise a chimeric gene encoding, in the 5′ to 3′ direction, the maize 27 kD zein promoter, a cDNA fragment encoding the instant polypeptides, and the 10 kD zein 3′ region.

The chimeric gene described above can then be introduced into corn cells by the following procedure. Immature corn embryos can be dissected from developing caryopses derived from crosses of the inbred corn lines H99 and LH132. The embryos are isolated 10 to 11 days after pollination when they are 1.0 to 1.5 mm long. The embryos are then placed with the axis-side facing down and in contact with agarose-solidified N6 medium (Chu et al. (1975) Sci. Sin. Peking 18:659-668). The embryos are kept in the dark at 27° C. Friable embryogenic callus consisting of undifferentiated masses of cells with somatic proembryoids and embryoids borne on suspensor structures proliferates from the scutellum of these immature embryos. The embryogenic callus isolated from the primary explant can be cultured on N6 medium and sub-cultured on this medium every 2 to 3 weeks.

The plasmid, p35S/Ac (obtained from Dr. Peter Eckes, Hoechst Ag, Frankfurt, Germany) may be used in transformation experiments in order to provide for a selectable marker. This plasmid contains the Pat gene (see European Patent Publication 0 242 236) which encodes phosphinothricin acetyl transferase (PAT). The enzyme PAT confers resistance to herbicidal glutamine synthetase inhibitors such as phosphinothricin. The pat gene in p35S/Ac is under the control of the 35S promoter from Cauliflower Mosaic Virus (Odell et al. (1985) Nature 313:810-812) and the 3′ region of the nopaline synthase gene from the T-DNA of the Ti plasmid of Agrobacterium tumefaciens.

The particle bombardment method (Klein et al. (1987) Nature 327:70-73) may be used to transfer genes to the callus culture cells. According to this method, gold particles (1 μm in diameter) are coated with DNA using the following technique. Ten μg of plasmid DNAs are added to 50 μL of a suspension of gold particles (60 mg per mL). Calcium chloride (50 μL of a 2.5 M solution) and spermidine free base (20 μL of a 1.0 M solution) are added to the particles. The suspension is vortexed during the addition of these solutions. After 10 minutes, the tubes are briefly centrifuged (5 sec at 15,000 rpm) and the supernatant removed. The particles are resuspended in 200 μL of absolute ethanol, centrifuged again and the supernatant removed. The ethanol rinse is performed again and the particles resuspended in a final volume of 30 μL of ethanol. An aliquot (5 μL) of the DNA-coated gold particles can be placed in the center of a Kapton™ flying disc (Bio-Rad Labs). The particles are then accelerated into the corn tissue with a Biolistic™ PDS-1000/He (Bio-Rad Instruments, Hercules Calif.), using a helium pressure of 1000 psi, a gap distance of 0.5 cm and a flying distance of 1.0 cm.

For bombardment, the embryogenic tissue is placed on filter paper over agarose-solidified N6 medium. The tissue is arranged as a thin lawn and covered a circular area of about 5 cm in diameter. The petri dish containing the tissue can be placed in the chamber of the PDS-1000/He approximately 8 cm from the stopping screen. The air in the chamber is then evacuated to a vacuum of 28 inches of Hg. The macrocarrier is accelerated with a helium shock wave using a rupture membrane that bursts when the He pressure in the shock tube reaches 1000 psi.

Seven days after bombardment the tissue can be transferred to N6 medium that contains gluphosinate (2 mg per liter) and lacks casein or proline. The tissue continues to grow slowly on this medium. After an additional 2 weeks the tissue can be transferred to fresh N6 medium containing gluphosinate. After 6 weeks, areas of about 1 cm in diameter of actively growing callus can be identified on some of the plates containing the glufosinate-supplemented medium. These calli may continue to grow when sub-cultured on the selective medium.

Plants can be regenerated from the transgenic callus by first transferring clusters of tissue to N6 medium supplemented with 0.2 mg per liter of 2,4-D. After two weeks the tissue can be transferred to regeneration medium (Fromm et al. (1990) Bio/Technology 8:833-839).

Example 7 Expression of Chimeric Genes in Dicot Cells

A seed-specific expression cassette composed of the promoter and transcription terminator from the gene encoding the β subunit of the seed storage protein phaseolin from the bean Phaseolus vulgaris (Doyle et al. (1986) J. Biol. Chem. 261:9228-9238) can be used for expression of the instant polypeptides in transformed soybean. The phaseolin cassette includes about 500 nucleotides upstream (5′) from the translation initiation codon and about 1650 nucleotides downstream (3′) from the translation stop codon of phaseolin. Between the 5′ and 3′ regions are the unique restriction endonuclease sites Nco I (which includes the ATG translation initiation codon), Sma I, Kpn I and Xba I. The entire cassette is flanked by Hind III sites.

The cDNA fragment of this gene may be generated by polymerase chain reaction (PCR) of the cDNA clone using appropriate oligonucleotide primers. Cloning sites can be incorporated into the oligonucleotides to provide proper orientation of the DNA fragment when inserted into the expression vector. Amplification is then performed as described above, and the isolated fragment is inserted into a pUC18 vector carrying the seed expression cassette.

Soybean embroys may then be transformed with the expression vector comprising sequences encoding the instant polypeptides. To induce somatic embryos, cotyledons, 3-5 mm in length dissected from surface sterilized, immature seeds of the soybean cultivar A2872, can be cultured in the light or dark at 26° C. on an appropriate agar medium for 6-10 weeks. Somatic embryos which produce secondary embryos are then excised and placed into a suitable liquid medium. After repeated selection for clusters of somatic embryos which multiplied as early, globular staged embryos, the suspensions are maintained as described below.

Soybean embryogenic suspension cultures can maintained in 35 mL liquid media on a rotary shaker, 150 rpm, at 26° C. with florescent lights on a 16:8 hour day/night schedule. Cultures are subcultured every two weeks by inoculating approximately 35 mg of tissue into 35 mL of liquid medium.

Soybean embryogenic suspension cultures may then be transformed by the method of particle gun bombardment (Klein et al. (1987) Nature (London) 327:70, U.S. Pat. No. 4,945,050). A DuPont Biolistic™ PDS 1000/HE instrument (helium retrofit) can be used for these transformations.

A selectable marker gene which can be used to facilitate soybean transformation is a chimeric gene composed of the 35S promoter from Cauliflower Mosaic Virus (Odell et al. (1985) Nature 313:810-812), the hygromycin phosphotransferase gene from plasmid pJR225 (from E. coli; Gritz et al.(1983) Gene 25:179-188) and the 3′ region of the nopaline synthase gene from the T-DNA of the Ti plasmid of Agrobacterium tumefaciens. The seed expression cassette comprising the phaseolin 5′ region, the fragment encoding the instant polypeptides and the phaseolin 3′ region can be isolated as a restriction fragment. This fragment can then be inserted into a unique restriction site of the vector carrying the marker gene.

To 50 μL of a 60 mg/mL 1 μm gold particle suspension is added (in order): 5 μL DNA (1 μg/μL), 20 μl spermidine (0.1 M), and 50 μL CaCl₂ (2.5 M). The particle preparation is then agitated for three minutes, spun in a microfuge for 10 seconds and the supernatant removed. The DNA-coated particles are then washed once in 400 μL 70% ethanol and resuspended in 40 μL of anhydrous ethanol. The DNA/particle suspension can be sonicated three times for one second each. Five μL of the DNA-coated gold particles are then loaded on each macro carrier disk.

Approximately 300-400 mg of a two-week-old suspension culture is placed in an empty 60×15 mm petri dish and the residual liquid removed from the tissue with a pipette. For each transformation experiment, approximately 5-10 plates of tissue are normally bombarded. Membrane rupture pressure is set at 1100 psi and the chamber is evacuated to a vacuum of 28 inches mercury. The tissue is placed approximately 3.5 inches away from the retaining screen and bombarded three times. Following bombardment, the tissue can be divided in half and placed back into liquid and cultured as described above.

Five to seven days post bombardment, the liquid media may be exchanged with fresh media, and eleven to twelve days post bombardment with fresh media containing 50 mg/mL hygromycin. This selective media can be refreshed weekly. Seven to eight weeks post bombardment, green, transformed tissue may be observed growing from untransformed, necrotic embryogenic clusters. Isolated green tissue is removed and inoculated into individual flasks to generate new, clonally propagated, transformed embryogenic suspension cultures. Each new line may be treated as an independent transformation event. These suspensions can then be subcultured and maintained as clusters of immature embryos or regenerated into whole plants by maturation and germination of individual somatic embryos.

Example 8 Expression of Chimeric Genes in Microbial Cells

The cDNAs encoding the instant polypeptides can be inserted into the T7 E. coli expression vector pBT430. This vector is a derivative of pET-3a (Rosenberg et al. (1987) Gene 56:125-135) which employs the bacteriophage T7 RNA polymerase/T7 promoter system. Plasmid pBT430 was constructed by first destroying the EcoR I and Hind III sites in pET-3a at their original positions. An oligonucleotide adaptor containing EcoR I and Hind III sites was inserted at the BamH I site of pET-3a. This created pET-3aM with additional unique cloning sites for insertion of genes into the expression vector. Then, the Nde I site at the position of translation initiation was converted to an Nco I site using oligonucleotide-directed mutagenesis. The DNA sequence of pET-3aM in this region, 5′-CATATGG, was converted to 5′-CCCATGG in pBT430.

Plasmid DNA containing a cDNA may be appropriately digested to release a nucleic acid fragment encoding the protein. This fragment may then be purified on a 1% NuSieve GTG™ low melting agarose gel (FMC). Buffer and agarose contain 10 μg/ml ethidium bromide for visualization of the DNA fragment. The fragment can then be purified from the agarose gel by digestion with GELase™ (Epicentre Technologies) according to the manufacturer's instructions, ethanol precipitated, dried and resuspended in 20 μL of water. Appropriate oligonucleotide adapters may be ligated to the fragment using T4 DNA ligase (New England Biolabs, Beverly, Mass.). The fragment containing the ligated adapters can be purified from the excess adapters using low melting agarose as described above. The vector pBT430 is digested, dephosphorylated with alkaline phosphatase (NEB) and deproteinized with phenol/chloroform as described above. The prepared vector pBT430 and fragment can then be ligated at 16° C. for 15 hours followed by transformation into DH5 electrocompetent cells (GIBCO BRL). Transformants can be selected on agar plates containing LB media and 100 μg/mL ampicillin. Transformants containing the gene encoding the instant polypeptides are then screened for the correct orientation with respect to the T7 promoter by restriction enzyme analysis.

For high level expression, a plasmid clone with the cDNA insert in the correct orientation relative to the T7 promoter can be transformed into E. coli strain BL21(DE3) (Studier et al. (1986) J. Mol. Biol. 189:113-130). Cultures are grown in LB medium containing ampicillin (100 mg/L) at 25° C. At an optical density at 600 nm of approximately 1, IPTG (isopropylthio-β-galactoside, the inducer) can be added to a final concentration of 0.4 mM and incubation can be continued for 3 h at 25°. Cells are then harvested by centrifugation and re-suspended in 50 μL of 50 mM Tris-HCl at pH 8.0 containing 0.1 mM DTT and 0.2 mM phenyl methylsulfonyl fluoride. A small amount of 1 mm glass beads can be added and the mixture sonicated 3 times for about 5 seconds each time with a microprobe sonicator. The mixture is centrifuged and the protein concentration of the supernatant determined. One μg of protein from the soluble fraction of the culture can be separated by SDS-polyacrylamide gel electrophoresis. Gels can be observed for protein bands migrating at the expected molecular weight.

27 1 1297 DNA Zea mays 1 tttttttcaa gaagacagga gaagggagtt gtagtgagtt ttaagaatgg cgagtgcaca 60 ggcagtgggg caaggagaac gaggccactt cgttctgaag agcggacaca ccattccggc 120 cgttggtcta ggcacttgga gggccggctc agataccgct cactctgttc ggaccgccat 180 cgccgaggct ggatataggc acgtggacac agctgcccaa tacggagtag agaaagaggt 240 cggtagagga cttaaagctg cgatggaggg cgggatcaac aggaaagatt tgtttgtgac 300 gtcgaagcta tggtgcaccg agctggctcc tgatagggtt cggccagcac tcgagaaaac 360 actcaaggac ttgcagctgg attacctgga tctctacctt atccactggc ccttcaggct 420 gaaagacggg gcgcacatgc ccccggaagc cggggaggtg ctggagttcg atatggaagg 480 ggtgtggagg gagatggaag gcctcgtgaa agacgggctc gtcaaggata taggtgtctg 540 caattacacg gtcgccaagc tcaaccgcct gatgcggtca gcgaatgttc caccggcagt 600 gtgccagatg gaaatgcacc ctgggtggaa gaacgacagg atctttgagg catgcaagaa 660 gcatgggatc catgttactg cttactctcc gctgggtccg tcagagaaga acctagcgca 720 cgacccgctc gtcgaaaagg tagccaacaa actggacaag accccggggc aggtgctcct 780 caggtgggcg ctccagaggg ggacaagcgt cattcctaaa tcgaccaagg acggaaggat 840 caaagagaac atccaggtgt tcgggtggga gatccctgag gaggacttca gggccctgtg 900 cggcatcaaa gatgagaagc gcgtgctgac cggagaggag ctgttcgtga acaagaccca 960 cgggccgtac aagagcgcga ccgaggtgtg ggaccacgag gactgagcgg actgccgtgc 1020 cgccggatcc ctccactcca cctgatgaaa ccagaataaa ggataccgac gcacctgtca 1080 gtcacctccc tcccgtgcct tgcgagagcg gcagcctctc gcacagggaa gatgctctgt 1140 gtctgagagc atgcagcctc gcacgagaaa gatgcagaag gagtgtgtgt ggcgcgcaat 1200 acactcctgt actgtacgat agactgaata ataataaaga agaaaacgca gcagtttgcc 1260 gttgcgtttt cctctgtgct tgcactatcg gtcgttc 1297 2 319 PRT Zea mays 2 Met Ala Ser Ala Gln Ala Val Gly Gln Gly Glu Arg Gly His Phe Val 1 5 10 15 Leu Lys Ser Gly His Thr Ile Pro Ala Val Gly Leu Gly Thr Trp Arg 20 25 30 Ala Gly Ser Asp Thr Ala His Ser Val Arg Thr Ala Ile Ala Glu Ala 35 40 45 Gly Tyr Arg His Val Asp Thr Ala Ala Gln Tyr Gly Val Glu Lys Glu 50 55 60 Val Gly Arg Gly Leu Lys Ala Ala Met Glu Gly Gly Ile Asn Arg Lys 65 70 75 80 Asp Leu Phe Val Thr Ser Lys Leu Trp Cys Thr Glu Leu Ala Pro Asp 85 90 95 Arg Val Arg Pro Ala Leu Glu Lys Thr Leu Lys Asp Leu Gln Leu Asp 100 105 110 Tyr Leu Asp Leu Tyr Leu Ile His Trp Pro Phe Arg Leu Lys Asp Gly 115 120 125 Ala His Met Pro Pro Glu Ala Gly Glu Val Leu Glu Phe Asp Met Glu 130 135 140 Gly Val Trp Arg Glu Met Glu Gly Leu Val Lys Asp Gly Leu Val Lys 145 150 155 160 Asp Ile Gly Val Cys Asn Tyr Thr Val Ala Lys Leu Asn Arg Leu Met 165 170 175 Arg Ser Ala Asn Val Pro Pro Ala Val Cys Gln Met Glu Met His Pro 180 185 190 Gly Trp Lys Asn Asp Arg Ile Phe Glu Ala Cys Lys Lys His Gly Ile 195 200 205 His Val Thr Ala Tyr Ser Pro Leu Gly Pro Ser Glu Lys Asn Leu Ala 210 215 220 His Asp Pro Leu Val Glu Lys Val Ala Asn Lys Leu Asp Lys Thr Pro 225 230 235 240 Gly Gln Val Leu Leu Arg Trp Ala Leu Gln Arg Gly Thr Ser Val Ile 245 250 255 Pro Lys Ser Thr Lys Asp Gly Arg Ile Lys Glu Asn Ile Gln Val Phe 260 265 270 Gly Trp Glu Ile Pro Glu Glu Asp Phe Arg Ala Leu Cys Gly Ile Lys 275 280 285 Asp Glu Lys Arg Val Leu Thr Gly Glu Glu Leu Phe Val Asn Lys Thr 290 295 300 His Gly Pro Tyr Lys Ser Ala Thr Glu Val Trp Asp His Glu Asp 305 310 315 3 1277 DNA Oryza sativa 3 ggcacgagga aaggtgaaga tagctaaacg gtgtgacaag caaggtaata gaaaggcgcg 60 atcatggcga gtgccaaggc gatggcgcag gatgagcatc actttgttct gaagagtggt 120 catgccatcc ctgcagttgg gttaggcact tggagggccg gctcagatac tgctcactcc 180 gttcagacag ccatcactga ggctggatac aggcatgtag atacggctgc tcaatatgga 240 atagaacagg aggtcggcaa agggcttaaa gctgcgatgg aagctggaat caacaggaaa 300 gatttgtttg tgacgtcaaa aatatggtgc acaaacttgg ctcctgagag agttcgacca 360 gcattaaaga acacgctgaa ggatctccag ttggattata tcgaccttta ccttattcat 420 tggcccttcc gtctaaaaga tggagcacac cagcctcctg aggctgggga agtcttggag 480 tttgacatgg aggcagtatg gagggaaatg gagagacttg tgacagatgg actggttaag 540 gacattggtg tctgcaattt ctcagttacc aagctcaaca gactgttgca atcagctaat 600 attccacctg cagtatgcca gatggaaatg caccctggtt ggaagaacaa taagattttc 660 gaggcctgca aaaaacatgg aattcatgtt actgcctact ccccactggg ttcttctgaa 720 aagaaccttg cgcatgatcc agttgtcgag aagatagcca acaagctgaa caagactcca 780 ggtcaagtgc tcatcaagtg ggctctccaa aggggaacaa gcgttattcc aaaatcaact 840 aaagatgaaa ggattaagga gaatatgcag gtgtttggat gggagatccc tgaagaggac 900 ttccaggtct tgtgcggcat caaagatgag aagcgagtcc tgacaggaga ggagctcttc 960 gtgaacaaga cccatgggcc atacaagagt gcatctgagg tctgggataa cgaggactaa 1020 gctgccatgt ttcacccaaa gatatggcaa ataatggtta tgatgttggt catgcacgaa 1080 ggagttatgt gatgttctcc aagcactgtg acgaaaccag ctaactcagc acaagatgta 1140 ctactatgtg taaaactagt attgttctat gtgtgctctt cttcaagctt tgtgtaacca 1200 gcttctcagc acaagatgta cagccagtgc tgtaagataa ataaaagtat catggctttg 1260 ccgttgcact tgctact 1277 4 318 PRT Oryza sativa 4 Met Ala Ser Ala Lys Ala Met Ala Gln Asp Glu His His Phe Val Leu 1 5 10 15 Lys Ser Gly His Ala Ile Pro Ala Val Gly Leu Gly Thr Trp Arg Ala 20 25 30 Gly Ser Asp Thr Ala His Ser Val Gln Thr Ala Ile Thr Glu Ala Gly 35 40 45 Tyr Arg His Val Asp Thr Ala Ala Gln Tyr Gly Ile Glu Gln Glu Val 50 55 60 Gly Lys Gly Leu Lys Ala Ala Met Glu Ala Gly Ile Asn Arg Lys Asp 65 70 75 80 Leu Phe Val Thr Ser Lys Ile Trp Cys Thr Asn Leu Ala Pro Glu Arg 85 90 95 Val Arg Pro Ala Leu Lys Asn Thr Leu Lys Asp Leu Gln Leu Asp Tyr 100 105 110 Ile Asp Leu Tyr Leu Ile His Trp Pro Phe Arg Leu Lys Asp Gly Ala 115 120 125 His Gln Pro Pro Glu Ala Gly Glu Val Leu Glu Phe Asp Met Glu Ala 130 135 140 Val Trp Arg Glu Met Glu Arg Leu Val Thr Asp Gly Leu Val Lys Asp 145 150 155 160 Ile Gly Val Cys Asn Phe Ser Val Thr Lys Leu Asn Arg Leu Leu Gln 165 170 175 Ser Ala Asn Ile Pro Pro Ala Val Cys Gln Met Glu Met His Pro Gly 180 185 190 Trp Lys Asn Asn Lys Ile Phe Glu Ala Cys Lys Lys His Gly Ile His 195 200 205 Val Thr Ala Tyr Ser Pro Leu Gly Ser Ser Glu Lys Asn Leu Ala His 210 215 220 Asp Pro Val Val Glu Lys Ile Ala Asn Lys Leu Asn Lys Thr Pro Gly 225 230 235 240 Gln Val Leu Ile Lys Trp Ala Leu Gln Arg Gly Thr Ser Val Ile Pro 245 250 255 Lys Ser Thr Lys Asp Glu Arg Ile Lys Glu Asn Met Gln Val Phe Gly 260 265 270 Trp Glu Ile Pro Glu Glu Asp Phe Gln Val Leu Cys Gly Ile Lys Asp 275 280 285 Glu Lys Arg Val Leu Thr Gly Glu Glu Leu Phe Val Asn Lys Thr His 290 295 300 Gly Pro Tyr Lys Ser Ala Ser Glu Val Trp Asp Asn Glu Asp 305 310 315 5 1073 DNA Glycine max 5 gcacgagcat ttctatttct aactaattat tgtgcttatt attattgttg agaaagaaaa 60 gaatggcaaa gttaataaaa ttctttgagt tgaacacagg ggccaagatt ccttctgttg 120 ggttaggcac ttggcaagct gagcctggtg ttgtagccaa agctgtcacc acagccattc 180 tggttggata caggcatatt gattgtgctc aagcgtataa caatcaagca gagattggtt 240 ctgctcttaa gaagcttttt gatgatggtg tggtgaagcg tgaggactta tggatcacct 300 ccaaactctg gtgttcagat catgcttcag aagatgtgcc caaagcattg gataaaacat 360 tgcaggattt gcaacttgat taccttgacc tctatctgat ccactggcca gtgcgcatga 420 aaagcggatc agttggattc aagaaggaat atctcgatca accggacatt cccagcacat 480 ggaaagcaat ggaggcactc tatgactcag gcaaggcaag agccatagga gttagcaatt 540 tctcttcaaa aaagcttcaa gatctcatga atatagcaag agtgcctcct gctgttaacc 600 aagtggaatt gcacccagga tggcagcagc caaagctgca tgcattctgt gaatctaaag 660 gagttcatct gtctggatat tctccactgg gctcaccagg agttctcaaa agtgacattc 720 ttaagaatcc tgttgtgata gagattgcag agaaattggg gaagacaccg gcacaagttg 780 cccttaggtg gggactgcaa acaggtcata gtgtgctgcc taagagcact aatgagtcca 840 gaatcaaggg aaactttgat gtgtttgact ggtctattcc agaagaagtg atggataagt 900 tctctgaaat taagcaggat agactaatta agggcacttt ttttgttgac gagacctatg 960 gtgcctttaa gaccgttgaa gagctttggg atggtgaact ctgagcaata tgcttcatag 1020 agatgttgac aaatgcactg ctcctcaagc agattgattc cgccttttac ctg 1073 6 313 PRT Glycine max 6 Met Ala Lys Leu Ile Lys Phe Phe Glu Leu Asn Thr Gly Ala Lys Ile 1 5 10 15 Pro Ser Val Gly Leu Gly Thr Trp Gln Ala Glu Pro Gly Val Val Ala 20 25 30 Lys Ala Val Thr Thr Ala Ile Leu Val Gly Tyr Arg His Ile Asp Cys 35 40 45 Ala Gln Ala Tyr Asn Asn Gln Ala Glu Ile Gly Ser Ala Leu Lys Lys 50 55 60 Leu Phe Asp Asp Gly Val Val Lys Arg Glu Asp Leu Trp Ile Thr Ser 65 70 75 80 Lys Leu Trp Cys Ser Asp His Ala Ser Glu Asp Val Pro Lys Ala Leu 85 90 95 Asp Lys Thr Leu Gln Asp Leu Gln Leu Asp Tyr Leu Asp Leu Tyr Leu 100 105 110 Ile His Trp Pro Val Arg Met Lys Ser Gly Ser Val Gly Phe Lys Lys 115 120 125 Glu Tyr Leu Asp Gln Pro Asp Ile Pro Ser Thr Trp Lys Ala Met Glu 130 135 140 Ala Leu Tyr Asp Ser Gly Lys Ala Arg Ala Ile Gly Val Ser Asn Phe 145 150 155 160 Ser Ser Lys Lys Leu Gln Asp Leu Met Asn Ile Ala Arg Val Pro Pro 165 170 175 Ala Val Asn Gln Val Glu Leu His Pro Gly Trp Gln Gln Pro Lys Leu 180 185 190 His Ala Phe Cys Glu Ser Lys Gly Val His Leu Ser Gly Tyr Ser Pro 195 200 205 Leu Gly Ser Pro Gly Val Leu Lys Ser Asp Ile Leu Lys Asn Pro Val 210 215 220 Val Ile Glu Ile Ala Glu Lys Leu Gly Lys Thr Pro Ala Gln Val Ala 225 230 235 240 Leu Arg Trp Gly Leu Gln Thr Gly His Ser Val Leu Pro Lys Ser Thr 245 250 255 Asn Glu Ser Arg Ile Lys Gly Asn Phe Asp Val Phe Asp Trp Ser Ile 260 265 270 Pro Glu Glu Val Met Asp Lys Phe Ser Glu Ile Lys Gln Asp Arg Leu 275 280 285 Ile Lys Gly Thr Phe Phe Val Asp Glu Thr Tyr Gly Ala Phe Lys Thr 290 295 300 Val Glu Glu Leu Trp Asp Gly Glu Leu 305 310 7 654 DNA Triticum aestivum unsure (404) unsure (438) unsure (453) unsure (469) unsure (474) unsure (497) unsure (502) unsure (526) unsure (528) unsure (530) unsure (541) unsure (569) unsure (632)..(633) unsure (639) unsure (653) 7 attaaagatg gctgaatcct ttgttctcag taccggctcg aggatcccat cggttgggct 60 tggcgtatgg caaatacaac ctgacgctgc caacgacgcc atctacgctg ctgtcaaggc 120 tgggtatcgg catattgact gtgcagcagc atacaacaat gaggaggagg tgggcctggc 180 tttgaagaaa ttatttgaag atggtgtggt taagcgtgat gatttgttta tcacctctaa 240 gctatgggct gctaatcatg cacctgaaga tgtggaagag ggaatcgaca ccacacttca 300 agatttgcag cttgactact tgggacttgt acctcatcca tggtccaatc cgcatcaaaa 360 aaaggaacta acacgatgac cctgaaaact tctccctaca gatnccctgc tacatgggca 420 gcgatggaga attatacnat ccggcaaaac tcntgcaatc cgcgtgatna ctcncttgta 480 agaactcatg attgctnccg tncacaatgc cccacatcaa caagtnantn caccggttgg 540 nacaagaaac tcggaacttc aatcaaggng tcacttcgat ccgcttagca ctgatcctga 600 taaggcattc taaaccatgg gccgtcaaaa tnnaaaacnc atcccacgga cang 654 8 308 PRT Triticum aestivum 8 Phe Val Leu Ser Thr Gly Ser Arg Ile Pro Ser Val Gly Leu Gly Val 1 5 10 15 Trp Gln Ile Gln Pro Asp Ala Ala Asn Asp Ala Ile Tyr Ala Ala Val 20 25 30 Lys Ala Gly Tyr Arg His Ile Asp Cys Ala Ala Ala Tyr Asn Asn Glu 35 40 45 Glu Glu Val Gly Leu Ala Leu Lys Lys Leu Phe Glu Asp Gly Val Val 50 55 60 Lys Arg Asp Asp Leu Phe Ile Thr Ser Lys Leu Trp Ala Ala Asn His 65 70 75 80 Ala Pro Glu Asp Val Glu Glu Gly Ile Asp Thr Thr Leu Gln Asp Leu 85 90 95 Gln Leu Asp Tyr Leu Asp Leu Tyr Leu Ile His Gly Pro Ile Arg Ile 100 105 110 Lys Lys Gly Thr Ser Thr Met Thr Pro Glu Asn Phe Leu Pro Thr Asp 115 120 125 Ile Pro Ala Thr Trp Ala Ala Met Glu Lys Leu Tyr Asp Ser Gly Lys 130 135 140 Ala Arg Ala Ile Gly Val Ser Asn Phe Ser Cys Lys Lys Leu His Asp 145 150 155 160 Leu Leu Ala Val Ala Arg Val Pro Pro Ala Val Asn Gln Val Glu Cys 165 170 175 His Pro Val Trp Gln Gln Asp Lys Leu Arg Lys Leu Cys Gln Ser Asn 180 185 190 Gly Val His Leu Ser Ala Phe Ser Pro Leu Gly Ser Pro Gly Ser Pro 195 200 205 Trp Ile Asn Gly Pro Ser Val Leu Lys Asn Pro Ile Val Val Ser Val 210 215 220 Ala Asp Lys Leu Gln Lys Thr Pro Ala Gln Val Ala Leu Arg Trp Gly 225 230 235 240 Ile Gln Met Gly His Ser Val Leu Pro Lys Ser Ala Asn Glu Ser Arg 245 250 255 Ile Lys Glu Asn Ile Asp Ile Phe Gly Trp Ser Ile Pro Glu Asp Leu 260 265 270 Met Ala Lys Phe Ser Glu Ile Lys Gln Val Arg Leu Leu Thr Ala Glu 275 280 285 Phe Val Val His Pro Gln Ala Gly Tyr Asn Thr Leu Glu Asp Phe Trp 290 295 300 Asp Gly Glu Ile 305 9 406 DNA Zea mays unsure (76) unsure (320) unsure (406) 9 tgccaacgag gcgaacagcc ggccaatcta gcatcagcgc gcggggtctg agagcagagc 60 ggcagggcgc catggnggca tcggtggcgc tgagcagcgg gcaccggatg ccggcggtgg 120 ggctgggcgt gtggcggatg gagaaggcgg acatccgcgg cctcatccac acagcgctcc 180 gcgtcggcta ccgccacctg gactgcgccg ctgactacca gaacgaagct gaagttggtg 240 acgcgctcgc agaggcattc cagaccggac tcgtcaagcg ggaggacctg ttcatcacaa 300 ccaagctgtg gaactcagan catgggcatg tgcttgaagc ctgcaaggac agcctgaaga 360 agctgcagct agactatctc gacctctacc tcatccattt cccagn 406 10 308 PRT Zea mays 10 Ser Val Ala Leu Ser Ser Gly His Arg Met Pro Ala Val Gly Leu Gly 1 5 10 15 Val Trp Arg Met Glu Lys Ala Asp Ile Arg Gly Leu Ile His Thr Ala 20 25 30 Leu Arg Val Gly Tyr Arg His Leu Asp Cys Ala Ala Asp Tyr Gln Asn 35 40 45 Glu Ala Glu Val Gly Asp Ala Leu Ala Glu Ala Phe Gln Thr Gly Leu 50 55 60 Val Lys Arg Glu Asp Leu Phe Ile Thr Thr Lys Leu Trp Asn Ser Asp 65 70 75 80 His Gly His Val Leu Glu Ala Cys Lys Asp Ser Leu Lys Lys Leu Gln 85 90 95 Leu Asp Tyr Leu Asp Leu Tyr Leu Ile His Phe Pro Val Ala Thr Arg 100 105 110 His Thr Gly Val Gly Thr Thr Ser Ser Ala Leu Gly Asp Asp Gly Val 115 120 125 Leu Asp Ile Asp Thr Thr Ile Ser Leu Glu Thr Thr Trp His Ala Met 130 135 140 Glu Glu Leu Val Ser Met Gly Leu Val Arg Ser Ile Gly Ile Ser Asn 145 150 155 160 Tyr Asp Ile Phe Leu Thr Arg Asp Cys Leu Ala Tyr Ala Lys Ile Lys 165 170 175 Pro Ala Val Asn Gln Ile Glu Thr His Pro Tyr Phe Gln Arg Asp Ser 180 185 190 Leu Val Lys Phe Cys Gln Lys His Gly Ile Cys Val Thr Ala His Thr 195 200 205 Pro Leu Gly Gly Ser Thr Ala Asn Ala Glu Trp Phe Gly Thr Val Ser 210 215 220 Cys Leu Asp Asp Pro Val Ile Lys Ser Leu Ala Asp Lys Tyr Gly Lys 225 230 235 240 Thr Pro Ala Gln Leu Val Leu Arg Trp Gly Leu Gln Arg Asp Thr Val 245 250 255 Val Ile Pro Lys Thr Ser Lys Val Glu Arg Leu Gln Glu Asn Phe Asp 260 265 270 Val Phe Gly Phe Asp Ile Ser Gly Glu Asp Met Glu Arg Met Lys Ala 275 280 285 Ile Asp Arg Lys Tyr Arg Thr Asn Gln Pro Ala Lys Phe Trp Gly Ile 290 295 300 Asp Leu Tyr Ala 305 11 1683 DNA Oryza sativa 11 gcacgagctt cttcttctcg tctccgattc caacgaggcg gcggagcaga gcagaggcgc 60 gggatggcgg cggcgcaggg gagcggagtg ccggcggcgc tggcgctgag cagcggccac 120 acgatgccgt cggtggggtt gggcgtgtgg cggatggact cccccgccat ccgcgacctc 180 atccactccg cactccgcat cggctaccgc cacttcgact gcgccgctga ttaccaaaac 240 gaggctgaag ttggggatgc acttgcagag gcattccaaa ctggacttgt caagagggag 300 gatcttttca tcacaaccaa gttgtggaac tcagatcatg ggcatgtggt tgaagcatgt 360 aaggatagct tgaaaaagtt gcggctagat tatctagatc tctaccttat ccacttccca 420 gtagctaccc gtcatactgg agttggtacg actgctagtg ctcttggtga tgatggtgtg 480 ctagacattg ataccactat ctcattggag acaacatggc acgctatgga ggatcttgtt 540 tccatgggac tggttcgcag cattgggatt agcaactatg acatattcct taccagagat 600 tgtttggctt atgctaagat aaagcccgca gtgaatcaaa tcgagacaca tccctacttc 660 cagcgcgact gtcttgtcaa gttctgccag aagcatggga tcttagtcac tgcccatacc 720 cctctgggtg gctccactgc caatactgag tggtttgggt ccgtctcatg cctcgacgac 780 cctgtcatca agtctctggc tgagaaatat ggcaagacac cggcgcagct ggtgctccgg 840 tgggggcttc agaggaacac agtggtgatc cccaagacat ccaaggagga gagattgcag 900 gagaactttg cggtcttcga tttcgccatc tccgacgagg acatggagaa gatgagatcc 960 atcgaccgga agtaccgcac caaccagcct gccaagttct ggggaatcga cctgtttgct 1020 tgatgaatta tgagtcttta gcacgaacaa taatgggggc ttttctactg tccctgggag 1080 cttcttgtgc aatcattttt ctctgaactg aaacttcttg tgctgaagga tgaagttgtt 1140 gggatcgtgt gaacttgaat tgttattcaa agggaaaaaa aaagtgtgaa cttgaattgt 1200 atctatattt cgtgtatttg cgcttctgca aaaaaaaaaa aaaaaaaaaa aaaaaaaaaa 1260 aaaaaaaaaa aaaaaaaaca aacaaaaaaa aaaaaaaaaa aaaaaaaaaa aaaaaaaaac 1320 cccccggggg ggggccggga accaattccc cccaaaaggg ggccgtttaa ccccccccaa 1380 ggggcggtct tttaaaaact ccgggagggg aaaaacccgg ggtttaccaa attaaccccc 1440 ttgggaaaaa accccctttt cccaaatggg gtaaaaacca aaagggcccc caccattccc 1500 cttcccaaaa atttgccaac cctaaaggga aatgggaacc ccccttgtac gggcaaataa 1560 acccccgcgg gtttggggtt tcccccacac gggcccgtaa aacttgaaag cccctaagcg 1620 ccggcccctt tgcgtttttt ccccctcctt ttccccacaa gtttgcccgg gtttccccga 1680 cag 1683 12 308 PRT Oryza sativa 12 Ala Leu Ala Leu Ser Ser Gly His Thr Met Pro Ser Val Gly Leu Gly 1 5 10 15 Val Trp Arg Met Asp Ser Pro Ala Ile Arg Asp Leu Ile His Ser Ala 20 25 30 Leu Arg Ile Gly Tyr Arg His Phe Asp Cys Ala Ala Asp Tyr Gln Asn 35 40 45 Glu Ala Glu Val Gly Asp Ala Leu Ala Glu Ala Phe Gln Thr Gly Leu 50 55 60 Val Lys Arg Glu Asp Leu Phe Ile Thr Thr Lys Leu Trp Asn Ser Asp 65 70 75 80 His Gly His Val Val Glu Ala Cys Lys Asp Ser Leu Lys Lys Leu Arg 85 90 95 Leu Asp Tyr Leu Asp Leu Tyr Leu Ile His Phe Pro Val Ala Thr Arg 100 105 110 His Thr Gly Val Gly Thr Thr Ala Ser Ala Leu Gly Asp Asp Gly Val 115 120 125 Leu Asp Ile Asp Thr Thr Ile Ser Leu Glu Thr Thr Trp His Ala Met 130 135 140 Glu Asp Leu Val Ser Met Gly Leu Val Arg Ser Ile Gly Ile Ser Asn 145 150 155 160 Tyr Asp Ile Phe Leu Thr Arg Asp Cys Leu Ala Tyr Ala Lys Ile Lys 165 170 175 Pro Ala Val Asn Gln Ile Glu Thr His Pro Tyr Phe Gln Arg Asp Cys 180 185 190 Leu Val Lys Phe Cys Gln Lys His Gly Ile Leu Val Thr Ala His Thr 195 200 205 Pro Leu Gly Gly Ser Thr Ala Asn Thr Glu Trp Phe Gly Ser Val Ser 210 215 220 Cys Leu Asp Asp Pro Val Ile Lys Ser Leu Ala Glu Lys Tyr Gly Lys 225 230 235 240 Thr Pro Ala Gln Leu Val Leu Arg Trp Gly Leu Gln Arg Asn Thr Val 245 250 255 Val Ile Pro Lys Thr Ser Lys Glu Glu Arg Leu Gln Glu Asn Phe Ala 260 265 270 Val Phe Asp Phe Ala Ile Ser Asp Glu Asp Met Glu Lys Met Arg Ser 275 280 285 Ile Asp Arg Lys Tyr Arg Thr Asn Gln Pro Ala Lys Phe Trp Gly Ile 290 295 300 Asp Leu Phe Ala 305 13 560 DNA Glycine max unsure (106) unsure (461) unsure (495) unsure (551) 13 ggaagagaga aaaaccatgg caataacact caacaatggc ttcaagatgc ctatcattgg 60 attgggcgtg tggcgcatgg aaggaaacga aatcagggac ctaatntctc aattccatca 120 aaattggtta tcgccatttt gattgtgctg ctgactacaa aaacgaagca gaagttggag 180 atgcgcttaa ggaggctttt gatagtggcc ttgtgaagag agaggatctc ttcattacca 240 ccaagctttg gaattctgat caaggccacg ttcttgaggc gtgtaaagac agtctcaaga 300 agcttcagtt aacgtatcta gatttatatc ttgttcactt tcctgttgcc gtaaggatac 360 tggggttggt aatacttcta gtcctttggg tgatgatggg gcctggacat agtacaccat 420 tccctggaaa cgacctggca tgcaatggaa gatcttgttt ntcggcttgt tcgcagcata 480 ggtcgcacta tgtanttctg acagagatgt tacatattca agtaagctgc tgtaatcgat 540 gaactcatca ncttcaggtg 560 14 309 PRT Glycine max 14 Met Ala Ile Thr Leu Asn Asn Gly Phe Lys Met Pro Ile Ile Gly Leu 1 5 10 15 Gly Val Trp Arg Met Glu Gly Asn Glu Ile Arg Asp Leu Ile Leu Asn 20 25 30 Ser Ile Lys Ile Gly Tyr Arg His Phe Asp Cys Ala Ala Asp Tyr Lys 35 40 45 Asn Glu Ala Glu Val Gly Asp Ala Leu Lys Glu Ala Phe Asp Ser Gly 50 55 60 Leu Val Lys Arg Glu Asp Leu Phe Ile Thr Thr Lys Leu Trp Asn Ser 65 70 75 80 Asp Gln Gly His Val Leu Glu Ala Cys Lys Asp Ser Leu Lys Lys Leu 85 90 95 Gln Leu Thr Tyr Leu Asp Leu Tyr Leu Val His Phe Pro Val Ala Val 100 105 110 Arg His Thr Gly Val Gly Asn Thr Ser Ser Pro Leu Gly Asp Asp Gly 115 120 125 Val Leu Asp Ile Asp Thr Thr Ile Ser Leu Glu Thr Thr Trp His Ala 130 135 140 Met Glu Asp Leu Val Ser Ser Gly Leu Val Arg Ser Ile Gly Ile Ser 145 150 155 160 Asn Tyr Asp Ile Phe Leu Thr Arg Asp Cys Leu Ala Tyr Ser Lys Ile 165 170 175 Lys Pro Ala Val Asn Gln Ile Glu Thr His Pro Tyr Phe Gln Arg Asp 180 185 190 Ser Leu Val Lys Phe Cys Gln Lys His Gly Ile Cys Val Thr Ala His 195 200 205 Thr Pro Leu Gly Gly Ala Ala Ala Asn Ala Glu Trp Phe Gly Thr Val 210 215 220 Ser Cys Leu Asp Asp Gln Val Leu Lys Gly Leu Ala Glu Lys Tyr Lys 225 230 235 240 Lys Thr Ala Ala Gln Ile Ser Leu Arg Trp Gly Ile Gln Arg Asn Thr 245 250 255 Val Val Ile Pro Lys Ser Ser Lys Leu Glu Arg Leu Lys Glu Asn Phe 260 265 270 Gln Val Phe Asp Phe Glu Leu Ser Lys Glu Asp Met Glu Leu Ile Gly 275 280 285 Ser Ile Asp Arg Lys Tyr Arg Thr Asn Gln Pro Ala Val Phe Trp Gly 290 295 300 Ile Asp Leu Tyr Ala 305 15 1154 DNA Zea mays 15 ccacgcgtcc gctcatctgc gtacacggtc tccctcttcc tgtcagtagt agagtgagag 60 tgaggcagcg agtgggagac aaggggaaat ggggaaggga gcgcaaggga gcgatgcggc 120 ggcggcgggc ggcgaggtgg aggagaacat ggcggcgtgg ctggttgcca agaacaccct 180 caagatcatg cccttcaagc tcccgcccgt cggcccttat gatgtccgcg tgcgcatgaa 240 agcagtgggg atttgcggca gcgatgtgca ctacctcagg gagatgcgca tcgcgcactt 300 cgtggtgaag gagccgatgg tgatcgggca cgagtgcgcg ggcgtggtcg aggaggtggg 360 cgccggcgtg acgcacctgt ccgtgggcga ccgcgtggcg ctggagccgg gcgtcagctg 420 ctggcgctgc cgccactgca agggcgggcg gtacaaccct gtgcgaggaa catgaagttc 480 ttcgccaccc cgccggtgca cggctcgctg gcgaaccagg tggtgcaccc ggccgacctg 540 tgcttcaagc tccccgacgg ggtgagcctg gaggagggcg ccatgtgcga gccgctgagc 600 gtgggcgtgc acgcgtgccg ccgcgcgggg gtggggcccg agacgggcgt gctcgtggtg 660 ggcgccggcc ccatcggcct ggtgtcgctg ctagcggcgc gagccttcgg cgcgccgcgc 720 gtggtggtcg tggacgtgga cgaccaccgc ctggccgtgg cccaggtcgc tgggcgcgga 780 cgcggcggtg cgggtgtcgc cccgcgcgga ggacctggcg gacgaggtgg agcgcatccg 840 cgcggccatg ggctcggaca tcgacgtcag cctggactgc gccgggttca gcaagaccat 900 gtcgacggcg ctggaggcga cgcggcccgg cgggaaggtg tgcctggtcg ggatgggcca 960 caacgagatg acgctgcccc tgacggcggc ggcggcgcgg gaggtggacg tggtgggcgt 1020 gttccggtac aaggacacct ggccgctgtg catcgacttc ctgcgcagcg gcaaggtgga 1080 cgtcaagccg ctcatcaccc accgcttcgg tttctcgcag cgggacgtgg aggaggcctt 1140 cgaggtcagc gccc 1154 16 341 PRT Zea mays 16 Ala Ala Ala Gly Gly Glu Val Glu Glu Asn Met Ala Ala Trp Leu Val 1 5 10 15 Ala Lys Asn Thr Leu Lys Ile Met Pro Phe Lys Leu Pro Pro Val Gly 20 25 30 Pro Tyr Asp Val Arg Val Arg Met Lys Ala Val Gly Ile Cys Gly Ser 35 40 45 Asp Val His Tyr Leu Arg Glu Met Arg Ile Ala His Phe Val Val Lys 50 55 60 Glu Pro Met Val Ile Gly His Glu Cys Ala Gly Val Val Glu Glu Val 65 70 75 80 Gly Ala Gly Val Thr His Leu Ser Val Gly Asp Arg Val Ala Leu Glu 85 90 95 Pro Gly Val Ser Cys Trp Arg Cys Arg His Cys Lys Gly Gly Arg Tyr 100 105 110 Asn Pro Val Arg Asn Met Lys Phe Phe Ala Thr Pro Pro Val His Gly 115 120 125 Ser Leu Ala Asn Gln Val Val His Pro Ala Asp Leu Cys Phe Lys Leu 130 135 140 Pro Asp Gly Val Ser Leu Glu Glu Gly Ala Met Cys Glu Pro Leu Ser 145 150 155 160 Val Gly Val His Ala Cys Arg Arg Ala Gly Val Gly Pro Glu Thr Gly 165 170 175 Val Leu Val Val Gly Ala Gly Pro Ile Gly Leu Val Ser Leu Leu Ala 180 185 190 Ala Arg Ala Phe Gly Ala Pro Arg Val Val Val Val Asp Val Asp Asp 195 200 205 His Arg Leu Ala Val Ala Arg Ser Leu Gly Ala Asp Ala Ala Val Arg 210 215 220 Val Ser Pro Arg Ala Glu Asp Leu Ala Asp Glu Val Glu Arg Ile Arg 225 230 235 240 Ala Ala Met Gly Ser Asp Ile Asp Val Ser Leu Asp Cys Ala Gly Phe 245 250 255 Ser Lys Thr Met Ser Thr Ala Leu Glu Ala Thr Arg Pro Gly Gly Lys 260 265 270 Val Cys Leu Val Gly Met Gly His Asn Glu Met Thr Leu Pro Leu Ala 275 280 285 Ala Arg Glu Val Asp Val Val Gly Val Phe Arg Tyr Lys Asp Thr Trp 290 295 300 Pro Leu Cys Ile Asp Phe Leu Arg Ser Gly Lys Val Asp Val Lys Pro 305 310 315 320 Leu Ile Thr His Arg Phe Gly Phe Ser Gln Arg Asp Val Glu Glu Ala 325 330 335 Phe Glu Val Ser Ala 340 17 718 DNA Oryza sativa unsure (313)..(314) unsure (351) unsure (418) unsure (470) unsure (514) unsure (519) unsure (524) unsure (527) unsure (537) unsure (548) unsure (618) unsure (631) unsure (635) unsure (646) unsure (680) unsure (691) unsure (693) unsure (702) unsure (706) unsure (717)..(718) 17 gtttaaacga gtgagtgagt gaagaggagg aagatgggga agggagggaa aggagccgag 60 gcggcggcgg cggcggtggc cggagccggt gaggaggaga acatggcggc gtggctggtg 120 gcgaagaaca ccctcaagat catgcccttc aagctcccgc cagttgggcc ttatgatgtc 180 cgtgtccgga tgaaggcagt gggcatctgc ggcagcgacg tgcactacct cagggagatg 240 cgcattgcgc atttcgtggt gaaggagccg atggtgatcg ggcacgagtg cgccggcgtg 300 atagaggagg tcnngcagcg gcgtgaccac ctcgccgtcg gcgaccgcgt nggcgctcga 360 gcccggcatc aactgctggc gctcaagcac tgcaagggcg gccgctacaa cttctgcnaa 420 gacatgaatt cttcgccacc ctcccgttca cggttcctcg ccaacaaatn gtcacctgtg 480 atctgtgctc aagctccgga gaacttaacc tgangaagng catntcnaac cctgacntgg 540 cttcaccntg cgcgcccact ccggcggaaa cggggtctat tatggccggg ccatttgctg 600 tcacctctgc gccccctngg caacctctat ntgcntgcaa accctnctgc attctggcca 660 ccctagttcg ccccagattn caggtgacgt ngngatggga tntacntccg taaaagnn 718 18 159 PRT Oryza sativa UNSURE (94) UNSURE (129) UNSURE (146) 18 Met Gly Lys Gly Gly Lys Gly Ala Glu Ala Ala Ala Ala Ala Val Ala 1 5 10 15 Gly Ala Gly Glu Glu Glu Asn Met Ala Ala Trp Leu Val Ala Lys Asn 20 25 30 Thr Leu Lys Ile Met Pro Phe Lys Leu Pro Pro Val Gly Pro Tyr Asp 35 40 45 Val Arg Val Arg Met Lys Ala Val Gly Ile Cys Gly Ser Asp Val His 50 55 60 Tyr Leu Arg Glu Met Arg Ile Ala His Phe Val Val Lys Glu Pro Met 65 70 75 80 Val Ile Gly His Glu Cys Ala Gly Val Ile Glu Glu Val Xaa Gln Arg 85 90 95 Arg Asp His Leu Ala Val Gly Asp Arg Val Gly Ala Arg Ala Arg His 100 105 110 Gln Leu Leu Ala Leu Lys His Cys Lys Gly Gly Arg Tyr Asn Phe Cys 115 120 125 Xaa Asp Met Asn Ser Ser Pro Pro Ser Arg Ser Arg Phe Leu Ala Asn 130 135 140 Lys Xaa Ser Pro Val Ile Cys Ala Gln Ala Pro Glu Asn Leu Thr 145 150 155 19 1610 DNA Glycine max 19 ttcggcacga ggaaatgggt aaggggggaa tgtcaattga tgaacatgga gaaggcaaag 60 aagagaatat ggctgcttgg cttgttggaa tgaacactct caagattcag cctttcaagc 120 ttcctacttt gggaccccat gatgtcagag ttagaatgaa ggctgttggt atctgtggga 180 gtgatgttca ctacctcaag acactgaggt gtgctcactt tatagttaaa gaaccaatgg 240 ttattggtca tgagtgtgct gggatcatag aagaagttgg tagtcaggta aagagtttgg 300 tgcctggtga ccgtgtggca attgagcctg ggatcagttg ttggcattgc aaccattgca 360 aacacggtcg atataactta tgcgatgata tgaagttttt tgctactcca ccagttcatg 420 gttccctggc taatcagata gtgcatcctg cagacctatg ttttaagctg ccagacaacg 480 tgagcctaga ggagggagca atgtgtgaac ccttaagtgt tggtgttcat gcttgtagaa 540 gagctaatat tggaccagaa acaaatgtgt tgatcatggg agcagggccc ataggacttg 600 ttacaatgct ggcagctcgt gcgtttgggg cacccaaaac agtcattgtg gatgttgatg 660 accatcgttt atctgttgca aaatctcttg gtgcagatga tattattaaa gtctcaacaa 720 acattaagga tgtggctgaa gaagttgtgc agatacagaa ggttatggga gctggtatag 780 atgttacctt tgattgtgct ggttttgaca aaaccatgtc tccagcactg agtgctactc 840 agccaggtgg caaagtttgc ctagtgggaa tgggacattc tgaaatgact gtcccactca 900 cccccagctg cagcaagttg tattggattt tcatcacatt tttaaaggct tggatacttc 960 actgatacat accgctgata tatccaagga agttgatgtg gttggagttt ttcgctatat 1020 gaacacatgg cctctttgcc ttgagtttct aaggagtggc aaaattgatg tgaaacccct 1080 tataacgcac aggtttggat tctctcaaaa ggaagtggaa gaagcctttg aaacaactgc 1140 tcgtggtggt aacgccatca aggtcatgtt caatctttag atactggact gtgactttac 1200 aaactgtcgt atgttgaaca aagtaggtaa tttacatgtt catgctcatg ttaaatacca 1260 atgtattgat aacacgggtt atgaataaag tggtttcaag aaggacttgt aaaacatgtt 1320 aatggtaact gcagcatcta cagattcagt tatgaagtga aactttttct taatatgtta 1380 atgagtaaac cctcaaattt gtctagtagt aattgagaat ttcaatgcac aataacaaac 1440 tgttgcttcc aacccgcttc atcatcactc tccctaatcc tacttctatt ctcctccttc 1500 ccctctgcct cgcgtctgtt cgctcctact cgcttccttg tctccaccta tgattacatg 1560 ataccttccc ctcggggggg ggggccgggc cacatatccc ccccaaagtg 1610 20 316 PRT Glycine max 20 Met Gly Lys Gly Gly Met Ser Ile Asp Glu His Gly Glu Gly Lys Glu 1 5 10 15 Glu Asn Met Ala Ala Trp Leu Val Gly Met Asn Thr Leu Lys Ile Gln 20 25 30 Pro Phe Lys Leu Pro Thr Leu Gly Pro His Asp Val Arg Val Arg Met 35 40 45 Lys Ala Val Gly Ile Cys Gly Ser Asp Val His Tyr Leu Lys Thr Leu 50 55 60 Arg Cys Ala His Phe Ile Val Lys Glu Pro Met Val Ile Gly His Glu 65 70 75 80 Cys Ala Gly Ile Ile Glu Glu Val Gly Ser Gln Val Lys Ser Leu Val 85 90 95 Pro Gly Asp Arg Val Ala Ile Glu Pro Gly Ile Ser Cys Trp His Cys 100 105 110 Asn His Cys Lys His Gly Arg Tyr Asn Leu Cys Asp Asp Met Lys Phe 115 120 125 Phe Ala Thr Pro Pro Val His Gly Ser Leu Ala Asn Gln Ile Val His 130 135 140 Pro Ala Asp Leu Cys Phe Lys Leu Pro Asp Asn Val Ser Leu Glu Glu 145 150 155 160 Gly Ala Met Cys Glu Pro Leu Ser Val Gly Val His Ala Cys Arg Arg 165 170 175 Ala Asn Ile Gly Pro Glu Thr Asn Val Leu Ile Met Gly Ala Gly Pro 180 185 190 Ile Gly Leu Val Thr Met Leu Ala Ala Arg Ala Phe Gly Ala Pro Lys 195 200 205 Thr Val Ile Val Asp Val Asp Asp His Arg Leu Ser Val Ala Lys Ser 210 215 220 Leu Gly Ala Asp Asp Ile Ile Lys Val Ser Thr Asn Ile Lys Asp Val 225 230 235 240 Ala Glu Glu Val Val Gln Ile Gln Lys Val Met Gly Ala Gly Ile Asp 245 250 255 Val Thr Phe Asp Cys Ala Gly Phe Asp Lys Thr Met Ser Pro Ala Leu 260 265 270 Ser Ala Thr Gln Pro Gly Gly Lys Val Cys Leu Val Gly Met Gly His 275 280 285 Ser Glu Met Thr Val Pro Leu Thr Pro Ser Cys Ser Lys Leu Tyr Trp 290 295 300 Ile Phe Ile Thr Phe Leu Lys Ala Trp Ile Leu His 305 310 315 21 933 DNA Triticum aestivum 21 gcacgaggcg gccgtggccg gcgaggggga gaacatggcg gcgtggctcg tggccaagaa 60 caccctcaag atcatgccct tcaagcttcc gccgctgggt ccttatgatg tgcgagtccg 120 gatgaaggcg gtgggcatct gcggcagcga cgtgcattac ctcaaggaga tgcgcattgc 180 gcatttcgtg gtgaaagagc cgatggtgat cgggcacgag tgcgctggca tcatcgagga 240 ggtgggcgac ggcgtgaagc acctcgccgt gggagaccgc gtggcgctgg agcccggcat 300 cagctgctgg cgctgcaggc actgcaaggg cggccgctac aacctctgcg acgacatgaa 360 gttcttcgcc accccacctt accatggatc acttgccgac cagattgtgc atccaggtga 420 cctgtgcttc aagcttccag acaacgtgag cctggaggag ggcgccatgt gcgagcccct 480 gagcgtgggg gtgcacgcct gccgccgagc cgacgtgggc gcggagaaga gcgtgctcat 540 catgggcgcc ggcccgatcg gcctggtcac catgctctcg gcgcgcgcct tcggggcgcc 600 caggatcgtc atcgccgacg tcgacgacca ccgcctctcc gtggccaagt ccctcggcgc 660 ggacgccgtc gtgaaggtct ccggcaacac ggaggacctc gcgggggaga tcgagcgcat 720 ccaggcggcg atgggaggcg acatcgacgt gagcctggac tgcgccgggt tcagcaagac 780 gatgtcgacg gcgctggagg cgacgcggcc gggcgggagg gtgtgcctgg tggggatggg 840 gcacaacgag atgacggtgc cgctgacgtc ggcggcgatc cgggaggtgg acgtggtggg 900 gatcttccgt tacaaggaca cgtggccgct gtg 933 22 301 PRT Triticum aestivum 22 Glu Asn Met Ala Ala Trp Leu Val Ala Lys Asn Thr Leu Lys Ile Met 1 5 10 15 Pro Phe Lys Leu Pro Pro Leu Gly Pro Tyr Asp Val Arg Val Arg Met 20 25 30 Lys Ala Val Gly Ile Cys Gly Ser Asp Val His Tyr Leu Lys Glu Met 35 40 45 Arg Ile Ala His Phe Val Val Lys Glu Pro Met Val Ile Gly His Glu 50 55 60 Cys Ala Gly Ile Ile Glu Glu Val Gly Asp Gly Val Lys His Leu Ala 65 70 75 80 Val Gly Asp Arg Val Ala Leu Glu Pro Gly Ile Ser Cys Trp Arg Cys 85 90 95 Arg His Cys Lys Gly Gly Arg Tyr Asn Leu Cys Asp Asp Met Lys Phe 100 105 110 Phe Ala Thr Pro Pro Tyr His Gly Ser Leu Ala Asp Gln Ile Val His 115 120 125 Pro Gly Asp Leu Cys Phe Lys Leu Pro Asp Asn Val Ser Leu Glu Glu 130 135 140 Gly Ala Met Cys Glu Pro Leu Ser Val Gly Val His Ala Cys Arg Arg 145 150 155 160 Ala Asp Val Gly Ala Glu Lys Ser Val Leu Ile Met Gly Ala Gly Pro 165 170 175 Ile Gly Leu Val Thr Met Leu Ser Ala Arg Ala Phe Gly Ala Pro Arg 180 185 190 Ile Val Ile Ala Asp Val Asp Asp His Arg Leu Ser Val Ala Lys Ser 195 200 205 Leu Gly Ala Asp Ala Val Val Lys Val Ser Gly Asn Thr Glu Asp Leu 210 215 220 Ala Gly Glu Ile Glu Arg Ile Gln Ala Ala Met Gly Gly Asp Ile Asp 225 230 235 240 Val Ser Leu Asp Cys Ala Gly Phe Ser Lys Thr Met Ser Thr Ala Leu 245 250 255 Glu Ala Thr Arg Pro Gly Gly Arg Val Cys Leu Val Gly Met Gly His 260 265 270 Asn Glu Met Thr Val Pro Leu Thr Ser Ala Ala Ile Arg Glu Val Asp 275 280 285 Val Val Gly Ile Phe Arg Tyr Lys Asp Thr Trp Pro Leu 290 295 300 23 320 PRT Hordeum vulgare 23 Met Ala Ser Ala Lys Ala Thr Met Gly Gln Gly Glu Gln Asp His Phe 1 5 10 15 Val Leu Lys Ser Gly His Ala Met Pro Ala Val Gly Leu Gly Thr Trp 20 25 30 Arg Ala Gly Ser Asp Thr Ala His Ser Val Arg Thr Ala Ile Thr Glu 35 40 45 Ala Gly Tyr Arg His Val Asp Thr Ala Ala Glu Tyr Gly Val Glu Lys 50 55 60 Glu Val Gly Lys Gly Leu Lys Ala Ala Met Glu Ala Gly Ile Asp Arg 65 70 75 80 Lys Asp Leu Phe Val Thr Ser Lys Ile Trp Cys Thr Asn Leu Ala Pro 85 90 95 Glu Arg Val Arg Pro Ala Leu Glu Asn Thr Leu Lys Asp Leu Gln Leu 100 105 110 Asp Tyr Ile Asp Leu Tyr His Ile His Trp Pro Phe Arg Leu Lys Asp 115 120 125 Gly Ala His Met Pro Pro Glu Ala Gly Glu Val Leu Glu Phe Asp Met 130 135 140 Glu Gly Val Trp Lys Glu Met Glu Asn Leu Val Lys Asp Gly Leu Val 145 150 155 160 Lys Asp Ile Gly Val Cys Asn Tyr Thr Val Thr Lys Leu Asn Arg Leu 165 170 175 Leu Arg Ser Ala Lys Ile Pro Pro Ala Val Cys Gln Met Glu Met His 180 185 190 Pro Gly Trp Lys Asn Asp Lys Ile Phe Glu Ala Cys Lys Lys His Gly 195 200 205 Ile His Val Thr Ala Tyr Ser Pro Leu Gly Ser Ser Glu Lys Asn Leu 210 215 220 Ala His Asp Pro Val Val Glu Lys Val Ala Asn Lys Leu Asn Lys Thr 225 230 235 240 Pro Gly Gln Val Leu Ile Lys Trp Ala Leu Gln Arg Gly Thr Ser Val 245 250 255 Ile Pro Lys Ser Ser Lys Asp Glu Arg Ile Lys Glu Asn Ile Gln Val 260 265 270 Phe Gly Trp Glu Ile Pro Glu Glu Asp Phe Lys Val Leu Cys Ser Ile 275 280 285 Lys Asp Glu Lys Arg Val Leu Thr Gly Glu Glu Leu Phe Val Asn Lys 290 295 300 Thr His Gly Pro Tyr Arg Ser Ala Ala Asp Val Trp Asp His Glu Asn 305 310 315 320 24 319 PRT Avena fatua 24 Met Ala Ser Ala Lys Ala Met Gly Gln Gly Glu Gln Asp Arg Phe Val 1 5 10 15 Leu Lys Ser Gly His Ala Ile Pro Ala Val Gly Leu Gly Thr Trp Arg 20 25 30 Ala Gly Ser Asp Thr Ala His Ser Val Gln Thr Ala Ile Thr Glu Ala 35 40 45 Gly Tyr Arg His Val Asp Thr Ala Ala Gln Tyr Gly Ile Glu Lys Glu 50 55 60 Val Asp Lys Gly Leu Lys Ala Ala Met Glu Ala Gly Ile Asp Arg Lys 65 70 75 80 Asp Leu Phe Val Thr Ser Lys Ile Trp Arg Thr Asn Leu Ala Pro Glu 85 90 95 Arg Ala Arg Pro Ala Leu Glu Asn Thr Leu Lys Asp Leu Gln Leu Asp 100 105 110 Tyr Ile Asp Leu Tyr Leu Ile His Trp Pro Phe Arg Leu Lys Asp Gly 115 120 125 Ala His Gln Pro Pro Glu Ala Gly Glu Val Leu Glu Phe Asp Met Glu 130 135 140 Gly Val Trp Lys Glu Met Glu Lys Leu Val Lys Asp Gly Leu Val Lys 145 150 155 160 Asp Ile Asp Val Cys Asn Phe Thr Val Thr Lys Leu Asn Arg Leu Leu 165 170 175 Arg Ser Ala Asn Ile Pro Pro Ala Val Cys Gln Met Glu Met His Pro 180 185 190 Gly Trp Lys Asn Asp Lys Ile Phe Glu Ala Cys Lys Lys His Gly Ile 195 200 205 His Val Thr Ala Tyr Ser Pro Leu Gly Ser Ser Glu Lys Asn Leu Val 210 215 220 His Asp Pro Val Val Glu Lys Val Ala Asn Lys Leu Asn Lys Thr Pro 225 230 235 240 Gly Gln Val Leu Ile Lys Trp Ala Leu Gln Arg Gly Thr Ser Val Ile 245 250 255 Pro Lys Ser Ser Lys Asp Glu Arg Ile Lys Glu Asn Ile Gln Ala Phe 260 265 270 Gly Trp Glu Ile Pro Glu Asp Asp Phe Gln Val Leu Cys Ser Ile Lys 275 280 285 Asp Glu Lys Arg Val Leu Thr Gly Glu Glu Leu Phe Val Asn Lys Thr 290 295 300 His Gly Pro Tyr Lys Ser Ala Ser Glu Val Trp Asp His Glu Asn 305 310 315 25 313 PRT Medicago sativa 25 Met Ala Thr Ala Ile Lys Phe Phe Gln Leu Asn Thr Gly Ala Lys Ile 1 5 10 15 Pro Ser Val Gly Leu Gly Thr Trp Gln Ala Glu Pro Gly Val Val Ala 20 25 30 Lys Ala Val Thr Thr Ala Val Gln Val Gly Tyr Arg His Ile Asp Cys 35 40 45 Ala Glu Ala Tyr Lys Asn Gln Ser Glu Ile Gly Ser Ala Leu Lys Lys 50 55 60 Leu Cys Glu Asp Gly Val Val Lys Arg Glu Glu Leu Trp Ile Thr Ser 65 70 75 80 Lys Leu Trp Cys Ser Asp His His Pro Glu Asp Val Pro Lys Ala Leu 85 90 95 Asp Lys Thr Leu Asn Asp Leu Gln Leu Asp Tyr Leu Asp Leu Tyr Leu 100 105 110 Ile His Trp Pro Val Ser Met Lys Arg Gly Thr Gly Glu Phe Met Gly 115 120 125 Glu Asn Leu Asp His Ala Asp Ile Pro Ser Thr Trp Lys Ala Leu Gly 130 135 140 Ala Leu Tyr Asp Ser Gly Lys Ala Lys Ala Ile Gly Val Ser Asn Phe 145 150 155 160 Ser Thr Lys Lys Leu Gln Asp Leu Leu Asp Val Ala Arg Val Pro Pro 165 170 175 Ala Val Asn Gln Val Glu Leu His Pro Gly Trp Gln Gln Ala Lys Leu 180 185 190 His Ala Phe Cys Glu Ser Lys Gly Ile His Leu Ser Gly Tyr Ser Pro 195 200 205 Leu Gly Ser Pro Gly Val Leu Lys Ser Asp Ile Leu Lys Asn Pro Val 210 215 220 Val Lys Glu Ile Ala Glu Lys Leu Gly Lys Thr Pro Gly Gln Val Ala 225 230 235 240 Leu Arg Trp Gly Leu Gln Ala Gly His Ser Val Leu Pro Lys Ser Thr 245 250 255 Asn Glu Ala Arg Ile Lys Lys Asn Leu Asp Val Tyr Asp Trp Ser Ile 260 265 270 Pro Glu Asp Leu Phe Pro Lys Phe Ser Glu Ile Lys Gln Asp Lys Leu 275 280 285 Ile Lys Gly Thr Phe Phe Val Asn Asp Thr Tyr Gly Ala Phe Arg Thr 290 295 300 Ile Glu Glu Leu Trp Asp Gly Glu Val 305 310 26 309 PRT Apium graveolens 26 Met Ala Ile Thr Leu Asn Ser Gly Phe Lys Met Pro Val Leu Gly Leu 1 5 10 15 Gly Val Trp Arg Met Asp Arg Asn Glu Ile Lys Asn Leu Leu Leu Ser 20 25 30 Ala Ile Asn Leu Gly Tyr Arg His Phe Asp Cys Ala Ala Asp Tyr Lys 35 40 45 Asn Glu Leu Glu Val Gly Glu Ala Phe Lys Glu Ala Phe Asp Thr Asp 50 55 60 Leu Val Lys Arg Glu Asp Leu Phe Ile Thr Thr Lys Leu Trp Asn Ser 65 70 75 80 Asp His Gly His Val Ile Glu Ala Cys Lys Asn Ser Leu Lys Lys Leu 85 90 95 Gln Leu Glu Tyr Leu Asp Leu Tyr Leu Ile His Phe Pro Met Ala Ser 100 105 110 Lys His Ser Gly Ile Gly Thr Thr Arg Ser Ile Leu Asp Asp Glu Gly 115 120 125 Val Trp Glu Val Asp Ala Thr Ile Ser Leu Glu Ala Thr Trp His Glu 130 135 140 Met Glu Lys Leu Val Glu Met Gly Leu Val Arg Ser Ile Gly Ile Ser 145 150 155 160 Asn Tyr Asp Val Tyr Leu Thr Arg Asp Ile Leu Ser Tyr Ser Lys Ile 165 170 175 Lys Pro Ala Val Asn Gln Ile Glu Thr His Pro Tyr Phe Gln Arg Asp 180 185 190 Ser Leu Ile Lys Phe Cys Gln Lys Tyr Gly Ile Ala Ile Thr Ala His 195 200 205 Thr Pro Leu Gly Gly Ala Leu Ala Asn Thr Glu Arg Phe Gly Ser Val 210 215 220 Ser Cys Leu Asp Asp Pro Val Leu Lys Lys Leu Ser Asp Lys His Asn 225 230 235 240 Lys Ser Pro Ala Gln Ile Val Leu Arg Trp Gly Val Gln Arg Asn Thr 245 250 255 Ile Val Ile Pro Lys Ser Ser Lys Thr Lys Arg Leu Glu Glu Asn Ile 260 265 270 Asn Ile Phe Asp Phe Glu Leu Ser Lys Glu Asp Met Glu Leu Ile Lys 275 280 285 Thr Met Glu Arg Asn Gln Arg Ser Asn Thr Pro Ala Lys Ala Trp Gly 290 295 300 Ile Asp Val Tyr Ala 305 27 371 PRT Malus domestica 27 Met Gly Lys Gly Gly Met Ser Asp Gly Asp His Ala Asp Arg Cys Cys 1 5 10 15 Gly Glu Ala Ile Asn Gly Asp Val Gln Gln Glu Asn Met Ala Ala Trp 20 25 30 Leu Leu Gly Val Lys Asn Leu Lys Ile Gln Pro Tyr Lys Leu Pro Asn 35 40 45 Leu Gly Pro His Asp Val Arg Val Arg Leu Arg Ala Val Gly Ile Cys 50 55 60 Gly Ser Asp Val His His Phe Lys Asn Met Arg Cys Val Asp Phe Ile 65 70 75 80 Val Lys Glu Pro Met Val Ile Gly His Glu Cys Ala Gly Ile Ile Glu 85 90 95 Glu Val Gly Ser Glu Val Glu His Leu Val Pro Gly Asp Arg Val Ala 100 105 110 Leu Glu Pro Gly Ile Ser Cys Lys Arg Cys Asn Leu Cys Lys Gln Gly 115 120 125 Arg Tyr Asn Leu Cys Arg Lys Met Lys Phe Phe Gly Ser Pro Pro Asn 130 135 140 Asn Gly Cys Leu Ala Asn Gln Val Val His Pro Gly Asp Leu Cys Phe 145 150 155 160 Lys Leu Pro Asp Asn Val Ser Leu Glu Glu Gly Ala Met Cys Glu Pro 165 170 175 Leu Ser Val Gly Ile His Ala Cys Arg Arg Ala Asn Val Cys Gln Glu 180 185 190 Thr Asn Val Leu Val Val Gly Ala Gly Pro Ile Gly Leu Val Thr Leu 195 200 205 Leu Ala Ala Arg Ala Phe Gly Ala Pro Arg Ile Val Ile Ala Asp Val 210 215 220 Asn Asp Glu Arg Leu Leu Ile Ala Lys Ser Leu Gly Ala Asp Ala Val 225 230 235 240 Val Lys Val Ser Thr Asn Ile Glu Asp Val Ala Glu Glu Val Ala Lys 245 250 255 Ile Gln Lys Val Leu Glu Asn Gly Val Asp Val Thr Phe Asp Cys Ala 260 265 270 Gly Phe Asn Lys Thr Ile Thr Thr Ala Leu Ser Ala Thr Arg Pro Gly 275 280 285 Gly Lys Val Cys Leu Val Gly Met Gly Gln Arg Glu Met Thr Leu Pro 290 295 300 Leu Ala Thr Arg Glu Ile Asp Val Ile Gly Ile Phe Arg Tyr Gln Asn 305 310 315 320 Thr Trp Pro Leu Cys Leu Glu Phe Leu Arg Ser Gly Lys Ile Asp Val 325 330 335 Lys Pro Leu Ile Thr His Arg Phe Gly Phe Ser Gln Lys Glu Val Glu 340 345 350 Glu Ala Phe Glu Thr Ser Ala Arg Gly Gly Asn Ala Ile Lys Val Met 355 360 365 Phe Asn Leu 370 

What is claimed is:
 1. An isolated polynucleotide comprising: (a) a nucleotide sequence encoding a polypeptide having aldhyde reductase activity and comprising at least 300 amino acids, wherein, the amino acid sequence of the polypeptide and the amino acid sequence of SEQ ID NO:2, SEQ ID NO:4, SEQ ID NO:6, or SEQ ID NO:8 have at least 95% identity based on the Clustal alignment method, or (b) the complement of the nucleotide sequence.
 2. The polynucleotide of claim 1 comprising the nucleotide sequence of SEQ ID NO: 1, SEQ ID NO:3, SEQ ID NO:5, or SEQ ID NO:7.
 3. The polynucleotide of claim 1, wherein the polypeptide comprises the amino acid sequence of SEQ ID NO:2, SEQ ID NO:4, SEQ ID NO:6, or SEQ ID NO:8.
 4. A chimeric gene comprising the polynucleotide of claim 1 operably linked to a regulatory sequence.
 5. A vector comprising the polynucleotide of claim
 1. 6. A cell comprising the chimeric gene of claim
 4. 7. A method for transforming a cell comprising transforming a cell with the polynucleotide of claim
 1. 8. A method for transforming a plant comprising transforming a plant cell with the polynucleotide of claim 1 and regenerating a plant from the transformed plant cell.
 9. A plant comprising the chimeric gene of claim
 4. 10. A seed comprising the chimeric gene of claim
 4. 